U4082B - VOICE SWITCHED SPEAKER-PHONE CIRCUIT
As a voice switched speaker-phone integrated circuit, the UTC U4082B includes the necessary amplifiers, attenuators, level detectors and control algorithm.
To form the UTC U4082B’s internal circuit, there is an internal microphone amplifier with adjustable gain and mute control, internal transmit a
U4082B Features
* Attenuator gain range: 52dB (between Transmit and Receive)
* For line-powered applications : 3~6.5V low voltage operation
* For improved sensitivity :4-point signal sensing
* For Transmit and Receive paths: background noise monitors
* External resistors set microphone amplifie
