max9930euat Maxim Integrated Products, Inc., max9930euat Datasheet - Page 10

• Manufacturer Part Number: max9930euat
• Description: 2mhz To 1.6ghz 45db Rf-detecting Controllers And Rf Detector
• Manufacturer: Maxim Integrated Products, Inc.

2MHz to 1.6GHz 45dB RF-Detecting
Controllers and RF Detector
The MAX9930–MAX9933 family of logarithmic ampli-
fiers (log amps) comprises four main amplifier/limiter
stages each with a small-signal gain of 10dB. The out-
Figure 1. Functional Diagram
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10
______________________________________________________________________________________
______________________________________________________________________________________
SHDN
SHDN
RFIN
RFIN
GND
GND
V
V
CC
CC
*INVERTING VOLTAGE TO CURRENT CONVERTER
Detailed Description
DET
DET
10dB
10dB
OFFSET
OFFSET
COMP
COMP
DET
DET
10dB
10dB
DET
DET
10dB
10dB
DET
DET
REFERENCE
REFERENCE
CURRENT
CURRENT
put stage of each amplifier is applied to a full-wave rec-
tifier (detector). A detector stage also precedes the first
gain stage. In total, five detectors, each separated by
10dB, comprise the log amp strip. Figure 1 shows the
functional diagram of the log amps.
10dB
10dB
OUTPUT-
ENABLED
OUTPUT-
ENABLED
DELAY
DELAY
DET
DET
MAX9930
MAX9931
MAX9932
MAX9933
g
g
m
m
V-I*
V-I*
X1
X1
OUT
CLPF
SET
OUT
CLPF