The circuit consists of an AGC preamplifier and output stage, capable of driving the class D integrated receiver. The compression control circuit varies the current controlled resistance, connected between the input and output of the AGC preamplifier. The compression circuit operates with an 8:1 compression ratio and uses an averaging detector with a time constant of 270ms, selected to provide optimal sound quality over the full range of sound and
listening environments. The actual attack and release times are typically 40ms and 150ms respectively when the circuit is fully in the compression region of operation (measured times will vary depending on gain and threshold settings).
The system gain and compression control can be adjusted by the choice of two independent resistors. Maximum system gain is 38dB and it can be adjusted within a 38dB range. The output compression threshold can be adjusted within a 16dB range.
Features
CIC suitable package size
8:1 compression ratio
38dB maximum system gain adjustable over 38dB range
Output compression threshold adjustable over 16dB range
Designed to drive a class D integrated receiver
Averaging detector
Standard Packaging
Hybrid typical dimensions:
0.162 in x 0.094 in x 0.070 in
(4.11 mm x 2.39 mm x 1.78 mm)br>
