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CA3088E
AM Receiver Subsystem and
General-Purpose Ampli鏗乪r Array
[ /Title
(CA30
88E)
/Sub-
ject
(AM
Receiv
er Sub-
sys-
tem
and
Gen-
eral-
Pur-
pose
Ampli-
鏗乪r
Array)
/Autho
r ()
/Key-
words
()
/Cre-
ator ()
/DOCI
NFO
pdf-
mark
[
/Page-
Mode
/Use-
Out-
lines
/DOC-
VIEW
pdf-
mark
Features
鈥?Excellent Overload Characteristics
鈥?AGC for IF Ampli鏗乪r
鈥?Buffered Output Signal for Tuning Meter
鈥?Internal Zener Diode Provides Voltage Regulation
鈥?Two IF Ampli鏗乪r Stages
鈥?Low-Noise Converter and First IF Ampli鏗乪r
鈥?Low Harmonic Distortion (THD)
鈥?Delayed AGC for RF Ampli鏗乪r
鈥?Terminals for Optional Inclusion of Tone Control
鈥?Operates from Wide Range of Power Supplies:
V+ = 6V to 16V
鈥?Optional AC and/or DC Feedback on Wide-Band
Ampli鏗乪r
鈥?Array of Ampli鏗乪rs for General-Purpose Applications
鈥?Suitable for Use With Optional External RF Stage,
Either MOS or Bipolar
鈥?Related at:
- Refer to AN6022 for Application Note Information
Description
The CA3088E, a monolithic integrated circuit, is an AM sub-
system that provides the converter, IF ampli鏗乪r, detector,
and audio preampli鏗乪r stages for an AM receiver.
The CA3088E also provides internal AGC for the 鏗乺st IF
ampli鏗乪r stage, delayed AGC for an optional external RF
ampli鏗乪r, a buffer stage to drive a tuning meter, and termi-
nals facilitating the optional use of a tone control.
Figure 2 is a functional diagram of the CA3088E. The signal
from the low-noise converter is applied to the 鏗乺st IF ampli-
鏗乪r and is then coupled to the second IF ampli鏗乪r. This IF
signal is then detected and externally 鏗乴tered. The resultant
audio signal is applied to an audio preampli鏗乪r. Optionally, a
tone control circuit may be connected at the junction of the
detector circuit and the audio preampli鏗乪r. The gain of the
鏗乺st IF ampli鏗乪r stage is controlled by an internal AGC cir-
cuit. The CA3088E supplies a delayed AGC signal output for
use with an external RF ampli鏗乪r. A buffered output signal is
also available for driving a tuning meter. A DC voltage, inter-
nally regulated by a Zener diode, supplies the second IF
ampli鏗乪r, the AGC and tuning meter circuits and may also be
used with any other stage.
The CA3088E features four independent transistor ampli鏗?
ers, each incorporating internal biasing for temperature
tracking. These ampli鏗乪rs are particularly useful in general-
purpose ampli鏗乪r, oscillator, and detector applications in a
wide variety of equipment designs.
Part Number Information
PART NUMBER
CA3088E
TEMP.
RANGE (
o
C)
-40 to 85
PACKAGE
16 Ld PDIP
PKG.
NO.
E16.3
Pinout
CA3088E
(PDIP)
TOP VIEW
CONV. BYPASS 1
CONV. IN 2
CONV. OUT 3
1ST IF IN 4
GND 5
1ST IF OUT 6
2ND IF FB 7
2ND IF IN 8
16 AUDIO V+
15 AUDIO OUT
14 AUDIO IN
13 RF AGC
12 TUNING METER
11 AGC FILTER
10 2ND IF V+
9 DET. OUT
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
漏
Harris Corporation 1999
File Number
560.2
8-23
INTERSIL
1
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