Patent ID: 8254561
Filing Date: 2012-08-28
Classification: H04M

Abstract:
1. A headset adapter circuit comprising: a controller; an adjustable gain receive signal amplifier on an adapter receive signal line; an adjustable gain transmit signal amplifier on an adapter transmit signal line; a configurable switch matrix connected to the adapter receive signal line, the adapter transmit signal line, a host phone transmit signal line and a host phone receive signal line; a maximal length sequence generator coupled to the adapter transmit signal line for injecting a maximal length sequence signal into the adapter transmit signal line; and a maximal length sequence cross-correlator coupled to the adapter receive signal line for capturing a receive signal sample from the adapter receive signal line and convolving the receive signal sample with the maximal length sequence signal to generate a host phone sidetone path impulse response, wherein an adjustable gain transmit signal amplifier gain and a configurable switch matrix switch setting are modifiable responsive to the host phone sidetone path impulse response.