SL6270C GEC Plessey Semiconductors, SL6270C Datasheet - Page 2

• Manufacturer Part Number: SL6270C
• Description: Gain Controlled Microphone Preamplifier / Vogad
• Manufacturer: GEC Plessey Semiconductors

functions of audio amplifier and voice operated gain adjusting
device (VOGAD).
microphone and to provide an essentially constant output
signal for a 50dB range of input. The dynamic range, attack
and decay times are controlled by external components.
FEATURES
APPLICATIONS
QUICK REFERENCE DATA
ABSOLUTE MAXIMUM RATINGS
Supply voltage: 12V
Storage temperature: -55 C to +125 C
Constant Output Signal
Fast Attack
Low Power Consumption
Simple Circuitry
Audio AGC Systems
Transmitter Overmodulation Protection
Tape Recorders
Supply Voltage: 4.5V to 10V
Voltage Gain: 52dB
The SL6270 is a silicon integrated circuit combining the
It is designed to accept signals from a low sensitivity
GAIN CONTROLLED MICROPHONE PREAMPLIFIER/VOGAD
SL6270C
PREAMP
INPUTS
Fig. 1 Pin connections, SL6270 - CM (bottom view)
100n
4
5
MAIN AMP INPUT
Fig. 2 Pin connections, SL6270 - DP (top view)
PREAMP INPUT
AGC TIME CONST
PREAMP OUPUT
EARTH 6
PREAMP INPUT
V
CC
0V
Fig. 3 SL6270 block diagram
PREAMP
OUTPUT
V
AGC
CC
PREAMP INPUT
6
C
MAIN AMP
T
OUTPUT
7
5
2
1
2
3
4
680
8
4
1
7
1
3
MAIN AMP
INPUT
2
R
CONSTANT
T
AGC TIME
AGC TIME CONST
V
8
7
6
5
2k
CC
PREAMP OUTPUT
MAIN AMP OUTPUT
MAIN AMP INPUT
0V
PREAMP INPUT
10k
DETECTOR
AGC
DP8, MP8
DS 3301 -1
8
CM8
MAIN AMP
OUTPUT