Analog Devices AD6122 Manual page 7

NOISE
SOURCE
HP8116A
ROHDE & SCHWARZ
FUNCTION GEN.
4 kHz, 0.5V TO 2.5V
100MHz, –30dBm
SQ. WAVE
AGC
IFIN
IFOUT
AD6122 TEST BED
a. Response Time from Gain Control to IF Output
REV. B
PULL-UP INDUCTORS CHOSEN
FOR PEAK RESPONSE AT THE
TEST FREQUENCY.
1:8
REACTIVE
CONJUGATE
MATCH 10nF
10nF
Figure 4. IF Amplifier's Noise Figure Test Set
SMT03
TEKTRONIX TDS 744A
CH 1 WITH X10 PROBE
CH 2 WITH COAX CABLE
50
Figure 5. Response Time Setup
VREG OUT
0.1 F
453
IFINP TXOPP
10nF
205
IFINN
TXOPN
453
10nF
AD6122
0.1 F
VREG OUT
HP8116A
FUNCTION GEN.
4kHz, 0V TO 2.7V
SQ. WAVE
PD1,
PD2
AD6122 TEST BED
b. Response Time from PD1 and PD2 Control to IF Output
–7–
AD6122
4:1
TO NOISE
FILTER
METER
ROHDE & SCHWARZ
SMT03
100kHz, –30dBm
IFIN
TEKTRONIX TDS 744A
CH 1 WITH X10 PROBE
IFOUT CH 2 WITH COAX CABLE
50