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DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
PC2798GR
IF DOWN CONVERTOR IC FOR DIGITAL CATV
DESCRIPTION
The PC2798GR is a Silicon monolithic IC designed for use as QAM IF down convertor for digital CATV. This IC consists of AGC amplifier, mixer, oscillator, and video amplifier. The package is 20 pins SSOP suitable for high-density surface mount.
FEATURES
* * * * * Low distortion AGC amplifier On chip IF convertor On chip video amplifier Supply voltage: 5 V Packaged in 20 pins SSOP suitable for high-density surface mount. IIP3 = -9 dBm fin = 30 to 250 MHz Vout = 3.0 VP-P (differential, @ RL = 1k)
ORDERING INFORMATION
PART NUMBER PACKAGE 20 pins plastic SSOP (225 mil) PACKAGE STYLE Embossed tape 12 mm wide. 2.5 k/REEL. Pin 1 indicates pull-out direction of tape
PC2798GR-E1
*:
For evaluation sample order, please contact your local NEC office. (Part number for sample order: PC2798GR)
Please refer to "Quality grade on NEC Semiconductor Devices" (Document number C11531E) published by NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
Caution electro-static sensitive device
The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability and additional information.
Document No. P11998EJ3V0DS00 (3rd edition) Date Published October 1999 N CP(K) Printed in Japan
The mark
shows major revised points.
(c)
1996, 1999
PC2798GR
INTERNAL BLOCK DIAGRAM AND PIN CONFIGURATION (Top View)
AGC Amp MIXER AGC IN1 AGC IN2 VAGC VCC1 OSC OUT GND OSC B2 OSC C1 OSC C2 OSC B1 1 2 3 4 5 6 7 8 9 10 VIDEO Amp OSC OSC OUT Buffer Amp 20 19 18 17 16 15 14 13 12 11 GND MIX OUT2 MIX OUT1 G1A G1B INA INB VCC2 OUT1 OUT2
OSC Buffer Amp
2
Data Sheet P11998EJ3V0DS00
PC2798GR
PIN EXPLANATIONS
Pin Voltage (V, TYP.) 1.5
Pin No. 1
Symbol AGC IN1
Explanation Input pin of IF signal. 1pin is same phase and 2pin is opposite phase at balance input. In case of single input, 1pin or 2pin should be grounded through capacitor.
Equivalent Circuit
4
AGC control
2
AGC IN2
1.5
Reg 1 2
4 3 AGC control
3
VAGC
0 to 5
Automatic gain control pin. This pin's bias govern the AGC output level. Minimum gain at VAGC = 0 V Maximum gain at VAGC = 5 V Recommend to use by deviding AGC voltage with externally resistor (ex. 100 k).
4
Vcc1
5.0
Power supply pin of IF down convertor block. Must be connected bypass capacitor to minimize ground impedance. Output pin of Oscillator frequency. Connected to PLL symthesizer IC's input pin.
4
5
OSC OUT
4.0
5 Reg
6
GND
0.0
Ground pin. Must be connected to the system ground with minimum inductance. Ground pattern on the board should be formed as wide as possible. Internal oscillator consist in balance amplifier. 7 and 8pins, 9 and 10 pins should be externally connected to oscillate with active feedback loop. Connected LC resonator between 7pin and 10pin.
7
OSC B2
2.4
7
8
4
9
10
8
OSC C1
4.6
9
OSC C2
4.6
Reg Reg
10
OSC B1
2.4
Data Sheet P11998EJ3V0DS00
3
PC2798GR
PIN EXPLANATIONS
Pin Voltage (V, TYP.) ( ) is value at Vcc2 = 9 V. 2.5 (4.7)
Pin No.
Symbol
Explanation
Equivalent Circuit
11
OUT2
Output pin of video amplifier. In case of RL = 1 k, differential output voltage equal 3 VP-P. OUT1 and INA are same phase. OUT2 and INB are same phase.
13
12 11
11
OUT1
2.5 (4.7)
REG
13
Vcc2
5 to 9
Power supply pin of video amplifier. Must be connected bypass capacitor to minimize ground impedance. Signal input pin of video amplifier. This pin is high impedance.
17 15 13 14 16
14
INB
2.5 (4.1)
15
INA
2.5 (4.1)
16
G1B
1.7 (3.3)
Gain control pin of video amplifier. Maximum gain at G1A-GIB = short. Minimum gain at G1A-G1B = open. Gain is able to adjust by inserting arbitrary resistor between 16pin and 17pin.
REG
17
G1A
1.7 (3.3)
18
MIX OUT1
3.7
Output pin of mixer. This output pin features low-impedance because of its emitter-follower output port.
4
18
19
MIX OUT2
3.7
19
REG
20
GND
0.0
Ground pin. Must be connected to the system ground with minimum inductance. Ground pattern on the board should be formed as wide as possible.
4
Data Sheet P11998EJ3V0DS00
PC2798GR
ABSOLUTE MAXIMUM RATINGS (TA = 25 C unless otherwise specified)
PARAMETER Supply Voltage 1 Supply Voltage 2 Power Dissipation Operating Ambient Temperature Storage Temperature SYMBOL Vcc1 Vcc2 PD TA Tstg RATING 6.0 6.0 430 -40 to +85 -55 to +150 UNIT V V mW C C TEST CONDITIONS Mixer block Video Amp block TA = 85 C
*1
PARAMETER Supply Voltage 1 Supply Voltage 2 Power Dissipation Operating Ambient Temperature Storage Temperature
SYMBOL Vcc1 Vcc2 PD TA Tstg
RATING 6.0 11.0 500 -40 to +75 -55 to +150
UNIT V V mW C C
TEST CONDITIONS Mixer block Video Amp block TA = 75 C
*1
*1. Mounted on 50 x 50 x 1.6 mm double copper epoxy glass board. RECOMMENDED OPERATING RANGE
PARAMETER Supply Voltage 1 Supply Voltage 2 Operating Ambient Temperature 1 Operating Ambient Temperature 2
*2
SYMBOL MIN. Vcc1 Vcc2 TA1 TA2 4.5 4.5 -40 -40
TYP. 5.0 5.0 +25 +25
MAX. 5.5 10.0 +85 +75
UNIT V V C C
*3
*2. @Vcc1 = Vcc2 = 4.5 to 5.5 V *3. @Vcc1 = 4.5 to 5.5 V, Vcc2 = 4.5 to 10.0 V ELECTRICAL CHARACTERISTICS (TA = 25 C)
PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITIONS
Total Block (RL = 1 k, by measurement circuit 5) Circuit Current 1 Maximum Conversion Gain 1 Maximum Conversion Gain 2 Minimum Conversion Gain 1 Minimum Conversion Gain 2 Circuit Current 2 Maximum Conversion Gain 3 Maximum Conversion Gain 4 Minimum Conversion Gain 3 Minimum Conversion Gain 4 Icc1 CGMAX1 CGMAX2 CGMIN1 CGMIN2 Icc1 CGMAX3 CGMAX4 CGMIN3 CGMIN4 24.0 68.0 32.0 32.0 72.0 35.5 74.0 58.0 39.0 22.0 47.0 78.5 59.0 43.5 22.5 45.0 76.0 43.0 60.0 81.0 mA dB dB dB dB mA dB dB dB dB no input signal, Vcc1 = Vcc2 = 5 V VAGC = 4.0 V, G1A-G1B pins: short VAGC = 4.0 V, G1A-G1B pins: open
*4
*4
VAGC = 1.0 V, G1A-G1B pins: short VAGC = 1.0 V, G1A-G1B pins: open
*4
*4
no input signal, Vcc1 = 5 V, Vcc2 = 9 V VAGC = 4.0 V, G1A-G1B pins: short VAGC = 4.0 V, G1A-G1B pins: open
*4
*4
VAGC = 1.0 V, G1A-G1B pins: short VAGC = 1.0 V, G1A-G1B pins: open
*4
*4
Data Sheet P11998EJ3V0DS00
5
PC2798GR
ELECTRICAL CHARACTERISTICS (TA = 25 C)
PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITIONS
AGC Amplifier + Mixer Block (@Vcc1 = 5 V, RL = 50 , by measurement circuit 1) Circuit Current 3 RF Input Frequency Range OSC Frequency Range IF Output Frequency Range Minimum Conversion Gain 5 Minimum Conversion Gain 5 AGC Dynamic Range Noise Figure AGC Voltage High Level AGC Voltage Low Level Icc3 fRF fOSC fIF CGMAX5 CGMIN5 GCR NF VAGCH VAGCL 15.0 30 30 DC 26 4.0 23.0 25 -7 32 9 28.0 250 250 150 1.0 mA Mhz Mhz Mhz dB dB dB dB V V VAGC = 4.0 V VAGC = 1.0 V
*4
no input signal
*4
VAGC = 1.0 to 4.0 V SSB, VAGC = 4.0 V (@Maximum Gain) @Maximum Gain @Minimum Gain
*4, 5
Video Amp. Block (@Vcc2 = 5 V, RL = 1 k, Input: 51 terminated, by measurement circuit 3) Circuit Current 4 Differential Gain 1 Differential Gain 2 Icc4 G1 G2 9.0 12.5 200 26.0 17.0 mA V/V V/V no input signal G1A-G1B pins: short, Vout = 3.0 VP-P, fin = 10 MHz G1A-G1B pins: open, Vout = 3.0 VP-P, fin = 10 MHz
Video Amp. Block (@Vcc2 = 9 V, RL = 1 k, Input: 51 terminated, by measurement circuit 3) Circuit Current 5 Differential Gain 3 Differential Gain 4 Icc5 G3 G4 17.0 24.0 385 28.5 32.0 mA V/V V/V no input signal G1A-G1B pins: short, Vout = 3.0 VP-P, fin = 10 MHz G1A-G1B pins: open, Vout = 3.0 VP-P, fin = 10 MHz
Video Amp. Block (@Vcc2 = 5 V or 9 V: Common, RL = 1 k, Input: 51 terminated, by measurement circuit 3) Output Voltage Bandwidth 1 Bandwidth 2 Input Resistance 1 Input Resistance 2 Input Capacitance VOUT BWG1 BWG2 Rin1 Rin2 Cin 3.0 50 50 3.5 9.7 1.6 VP-P MHz MHz k k pF RL = 1 k, differential G1 (G1A-G1B pins: short) G2 (G1A-G1B pins: open) G1 (G1A-G1B pins: short) G2 (G1A-G1B pins: open)
*4. fRF = 45 MHz, fOSC = 55 MHz, POSC = -10 dBm *5. By measurement circuit 2
6
Data Sheet P11998EJ3V0DS00
PC2798GR
STANDARD CHARACTERISTICS (TA = 25 C)
PARAMETER SYMBOL VALUE FOR REFERENCE UNIT TEST CONDITIONS
AGC Amplifier + Mixer Block (@Vcc1 = 5 V, by measurement circuit 1) AGC Input Intercept Point 1 AGC IIP31 -9 dBm VAGC = 1.0 V @Minimum Gain *6
Video Amp. Block (RL = 50 , input: 51 terminated, by measurement circuit 4) Single-end Gain 1 Single-end Gain 2 Single-end Gain 3 Single-end Gain 4 Input Intercept Point 2 Input Intercept Point 3 AVS1 AVS2 AVS3 AVS4 IIP32 IIP33 40.0 22.5 45.0 23.5 -11.5 -5.0 dB dB dB dB dBm dBm VCC2 = 5 V, G1A-G1B pins: short VCC2 = 5 V, G1A-G1B pins: open VCC2 = 9 V, G1A-G1B pins: short VCC2 = 9 V, G1A-G1B pins: open VCC2 = 5 V, G1A-G1B pins: open fin1 = 9 MHz, fin2 = 11 MHz VCC2 = 9 V, G1A-G1B pins: open fin1 = 9 MHz, fin2 = 11 MHz
Video Amp. Block (@Vcc2 = 5 V or 9 V: Common, by measurement circuit 3) Common Mode Rejection Ratio Power Supply Rejection Ratio Rise Time Propagation Delay Time CMRR PSRR R PD 80 70 2.6 4.4 dB dB ns ns VCM = 1 VP-P, f = 100 kHz
Total Block (RL = 1 k, by measurement circuit 5) Input Intercept Point 4 Input Intercept Point 5 Input Intercept Point 6 IIP34 IIP35 IIP36 -14.0 -8.0 -7.5 dBm dBm dBm VCC1 = VCC2 = 5 V, VAGC = 1 V, G1A-G1B pins: short VCC1 = VCC2 = 5 V, VAGC = 1 V, G1A-G1B pins: open VCC1 = 5 V, VCC2 = 9 V, VAGC = 1 V, G1A-G1B pins: open *6 *6 *6
*6 fRF1 = 44 MHz, fRF2 = 46 MHz, fOSC = 55 MHz, POSC = -10 dBm
Data Sheet P11998EJ3V0DS00
7
PC2798GR
TYPICAL CHARACTERISTICS (by measurement circuit 5, TA = 25 C, fOSC = fRF + 10 MHz, POSC = -10 dBm)
CONVERSION GAIN vs. INPUT FREQUENCY 80 VAGC = 4 V
CG - Conversion Gain - dB CG - Conversion Gain - dB
CONVERSION GAIN vs. INPUT FREQUENCY 80 VAGC = 4 V VAGC = 3 V 60
60 VAGC = 3 V
VAGC = 1 V 40
40 VAGC = 1 V
20 VCC1 = 5 V VCC2 = 5 V 1 k Load G1A-G1B: short 0 50 100 150 200 250 fRF - Input Freqency - MHz
20 VCC1 = 5 V VCC2 = 9 V 1 k Load G1A-G1B: short 0 0 50 100
0
150
200
250
fRF - Input Frequency - MHz
CONVERSION GAIN vs. INPUT FREQUENCY 80 80
CONVERSION GAIN vs. INPUT FREQUENCY
CG - Conversion Gain - dB
60
CG - Conversion Gain - dB
VAGC = 4 V
60
VAGC = 4 V
40
VAGC = 3 V VAGC = 1 V
40
VAGC = 3 V VAGC = 1 V
20 VCC1 = 5 V, VCC2 = 5 V G1A-G1B: open 0 1 k load 0 50 100
20 VCC1 = 5 V, VCC2 = 9 V G1A-G1B: open 0 1 k load 0 50 100
150
200
250
150
200
250
fRF - Input Frequency - MHz
fRF - Input Frequency - MHz
8
Data Sheet P11998EJ3V0DS00
PC2798GR
TYPICAL CHARACTERISTICS (by measurement circuit 5, TA = 25 C, fRF = 45 MHz, POSC = -10 dBm)
CONVERSION GAIN vs. INTERMEDIATE FREQUENCY 80 CONVERSION GAIN vs. INTERMEDIATE FREQUENCY 80
CG - Conversion Gain - dB
60 VAGC = 4 V
CG - Conversion Gain - dB
60
VAGC= 4 V
40
VAGC = 3 V
VAGC= 3 V 40
20
VAGC = 1 V
VAGC= 1 V 20 VCC1 = 5 V, VCC2 = 9 V G1A-G1B: short 0 1 k load 0 40 80 120 fIF - Intermediate Frequency - MHz
VCC1 = 5 V, VCC2 = 5 V G1A-G1B: short 0 1 k load 0 40 80 120 fIF - Intermediate Frequency - MHz
160
160
CONVERSION GAIN vs. INTERMEDIATE FREQUENCY 80
CONVERSION GAIN vs. INTERMEDIATE FREQUENCY 80
CG - Conversion Gain - dB
60
CG - Conversion Gain - dB
60
40
VAGC = 4 V
VAGC = 4 V 40
20
VAGC = 3 V
VAGC = 3 V 20 VCC1 = 5 V, VCC2 = 9 V G1A-G1B: open 0 1 k load 0 40 80 120 fIF - Intermediate Frequency - MHz
VCC1 = 5 V, VCC2 = 5 V G1A-G1B: open 0 1 k load 0 40 80 120 fIF - Intermediate Frequency - MHz
160
160
Data Sheet P11998EJ3V0DS00
9
PC2798GR
TYPICAL CHARACTERISTICS (by measurement circuit 1, TA = 25 C)
CIRCUIT CURRENT vs. SUPPLY VOLTAGE 50 no input signal VAGC = 0 V 30 Total
CG - Conversion Gain - dB
CONVERSION GAIN vs. INPUT FREQUENCY
40
ICC - Circuit Current - mA
20 10
VAGC = 4.0 V
30
Mixer + AGC + VCO Video Amp
VAGC = 2.6 V 0 -10 -20 -30
20
VAGC = 0.0 V fOSC = fRF + 10 MHZ POSC = -10 dBm VCC1 = 5 V 0 50 100 150 200 250 300
10
0
0
2
4
6
8
10
12
VCC - Supply Voltage - V CONVERSION GAIN vs. INTERMEDIATE FREQUENCY 30 20
CG - Conversion Gain - dB
fRF - Input Frequency - MHz NOISE FIGURE vs. AGC VOLTAGE 30
VAGC= 4.0 V
NF - Noise Figure - dB
10 VAGC= 2.6 V 0 -10 -20 -30 fRF = 45 MHZ fOSC = 55 to 210 MHZ POSC = -10 dBm VCC1 = 5 V 0 30 60 90 120 150 180
20
VAGC= 0.0 V
10 VCC1 = 5 V fRF = 100 MHZ fOSC = 120 MHZ POSC = -10 dBm DSB mode 0 0 1 2 3 4 5
fIF - Intermediate Frequency - MHz CONVERSION GAIN vs. AGC VOLTAGE 30 VCC1 = 5 V fRF = 45 MHZ PRF = -60 dBm fOSC = 50 MHZ POSC = -10 dBm -10 VCC1 = 5 V -20 VAGC = 0 V fRF1 = 44 MHZ fRF2 = 46 MHZ -30 fOSC = 55 MHZ POSC = -10 dBm -40 -50 -60 -70 -80 -10 -90 -60
VAGC - AGC Voltage - V OUTPUT POWER vs. INPUT POWER
CG - Conversion Gain - dB
20
10
0
Pout - Output Power - dBm
0
1
2
3
4
5
-50
-40
-30
-20
-10
0
VAGC - AGC Voltage - V
Pin - Input Power - dBm
10
Data Sheet P11998EJ3V0DS00
PC2798GR
STANDARD CHARACTERISTICS (by measurement circuit 3, TA = 25 C)
DIFFERENTIAL GAIN vs. INPUT FREQUENCY 400 VCC2 = 9 V GVIDEO - Differential Gain - V/V 300 GVIDEO - Differential Gain - V/V 30 40 DIFFERENTIAL GAIN vs. INPUT FREQUENCY
VCC2 = 9 V
200 VCC2 = 5 V
20
VCC2 = 5 V
100 G1A-G1B: short POUT = 1.5 Vp-p const. 0 0 20 40 60 80 100 fin - Input Frequency - MHz OUTPUT POWER vs. INPUT POWER 0
10 G1A-G1B: open POUT = 1.5 Vp-p const. 0 0 20 40 60 80 100 fin - Input Frequency - MHz OUTPUT POWER vs. INPUT POWER 0
Pout - Output Power (50 /1 k) - dBm
VCC2 = 9 V
Pout - Output Power (50 /1 k) - dBm
-10
VCC2 = 9 V
-10 VCC2 = 5 V
-20 VCC2 = 5 V -30
-20
-40 fin = 10 MHz G1A-G1B: open -50 -40 -30 -20 10 0 10
fin = 10 MHz G1A-G1B: short -30 -40 -30 -20 -10 0
Pin - Input Power (50 ) - dBm DIFFERENTIAL GAIN vs. EXTERNAL RESISTANCE 500 fin =10 MHz GVIDEO - Differential Gain - V/V 400
Pin - Input Power (50 ) - dBm
300
200
VCC2 = 9 V
100
VCC2 = 5 V
0 short 30 43 56 100 246 2000 open Resistance -
Data Sheet P11998EJ3V0DS00
11
PC2798GR
STANDARD CHARACTERISTICS (by measurement circuit 4, TA = 25 C)
GAIN vs. INPUT FREQUENCY 50 50 GAIN vs. INPUT FREQUENCY
40
40
AVS - Gain - dB
30
AVS - Gain - dB
VCC2 = 5 V G1A-G1B: short
30
20
20
10
10 VCC2 = 5 V G1A-G1B: open 10 100 0 0.1 1 10 100 Input Frequency fin - MHz GAIN vs. INPUT FREQUENCY 50
0
0.1
1
Input Frequency fin - MHz GAIN vs. INPUT FREQUENCY 50
40
40
AVS - Gain - dB
30
AVS - Gain - dB
VCC2 = 9 V G1A-G1B: short
30
20
20
10
10 VCC2 = 9 V G1A-G1B: open 10 100 0 0.1 1 10 100 Input Frequency fin - MHz OUTPUT POWER vs. INPUT POWER 20
0
0.1
1
Input Frequency fin - MHz OUTPUT POWER vs. INPUT POWER 20
Pout - Output Power (50 )/tone - dBm
0
Pout - Output Power (50 )/tone - dBm
0
-20
-20
-40
-40
-60
VCC2 = 5 V f1 = 9 MHz f2 = 11 MHz G1A-G1B: open -40 -30 -20 Pin - Input Power (50 )/tone - dBm -10
-60
VCC2 = 9 V f1 = 9 MHz f2 = 11 MHz G1A-G1B: open -40 -30 -20 Pin - Input Power (50 )/tone - dBm -10
-80 -50
-80 -50
12
Data Sheet P11998EJ3V0DS00
PC2798GR
STANDARD CHARACTERISTICS (by measurement circuit 5)
OUTPUT POWER vs. INPUT POWER OUTPUT POWER vs. INPUT POWER 0
Pout - Output Power (50 /1 k)/tone - dBm
0
Pout - Power Pout (50 /1 k)/tone - dBm
-20
-20
-40
-40
-60
-80 -50
VCC1 = 5 V VCC2 = 5 V f1 = 44 MHz f2 = 46 MHz fOSC = 55 MHz POSC = -10 dBm G1A-G1B: open -40 -30 -20 -10 Pin - Input Power (50 )/tone - dBm 0
-60
-80 -50
VCC1 = 5 V VCC2 = 9 V f1 = 44 MHz f2 = 46 MHz fOSC = 55 MHz POSC = -10 dBm G1A-G1B: open -40 -30 -20 -10 0 Pin - Input Power (50 )/tone - dBm
OUTPUT POWER vs. INPUT POWER
Pout - Output Power (50 /1 k)/tone - dBm
0
-20
-40
-60
-80 -50
VCC1 = 5 V VCC2 = 5 V f1 = 44 MHz f2 = 46 MHz fOSC = 55 MHz POSC = -10 dBm G1A-G1B: short -40 -30 -20 -10 0 Pin - Input Power (50 )/tone - dBm
Data Sheet P11998EJ3V0DS00
13
PC2798GR
STANDARD CHARACTERISTICS (by application circuit example: MIXER block, TA = 25 C)
CONVERSION GAIN vs. INPUT FREQUENCY 30 30 NOISE FIGURE vs. AGC VOLTAGE
CG - Conversion Gain - dB
NF - Noise Figure - dB
VCC1 = 5.5 V
20
25
VCC1 = 5.0 V VCC1 = 4.5 V
10
20
fRF = 50 MHz fIF = 10 MHz PRF = -50 dBm VAGC = 4 V 30 40 50 60
0 0
fRF = 50 MHz fIF = 10 MHz VCC1 = 4.5 V VCC1 = 5.0 V VCC1 = 5.5 V DSB 1 2 3 4 5 VAGC - AGC Voltage - V OUTPUT POWER vs. INPUT POWER
fRF - Input Frequency - MHz CONVERSION GAIN vs. AGC VOLTAGE 30 fRF = 50 MHz fIF = 10 MHz PRF = -50 dBm VCC1 = 4.5 V VCC1 = 5.0 V VCC1 = 5.5 V -10 -20
Pout - Output Power - dBm
CG - Conversion Gain - dB
20
-30 -40 -50 -60 -70 -80 -90 VCC1 = 5 V fRF1 = 45 MHz fRF2 = 46 MHz fOSC = 55 MHz VAGC = 0 V -50 -40 -30 -20 -10 0 10
10
0
-10 0 1 2 3 4 5 VAGC - AGC Voltage - V OSCILLATOR FREQUENCY vs. TUNING VOLTAGE 70
-100 -60
Pin - Input Power - dBm
fOSC - Oscillator Frequency - MHz
60
50
40
VCC1 = 5 V 30 0 5 10 15 20 Vtu - Tuning Voltage - V
14
Data Sheet P11998EJ3V0DS00
PC2798GR
MEASUREMENT CIRCUIT 1
10 nF IN 10 nF 100 k VAGC VCC1 1 nF OSC OUT 10 nF 6 7 8 9 10 nF OSC IN 10 VIDEO Amp OSC 15 14 13 12 11 220 nF 3 100 k 220 nF 4 5 OSC OUT Buffer Amp OSC Buffer Amp 18 10 nF 17 16 50 1 2 AGC Amp MIXER 20 10 nF 19 MIX OUT
10 nF
MEASUREMENT CIRCUIT 2
Noise Source
NF METER
10 nF 10 nF BPF VAGC VCC1 1 nF 50 100 k 220 nF 100 k 220 nF
AGC Amp MIXER 1 2 3 4 5 OSC OUT Buffer Amp 20 19 10 nF OSC Buffer Amp 18 10 nF 17 16 15 14 VIDEO Amp OSC 13 12 11 50 BPF
10 nF 6 7 10 nF 8 9
SG1 (50 )
10 nF 10
Data Sheet P11998EJ3V0DS00
15
PC2798GR
MEASUREMENT CIRCUIT 3

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