Adaptive audio compressor

Details Adaptive audio compressor Adaptive audio compressor

H - Electricity

03

L

179/2, 325/67

H03L 5/00 (2006.01) H03G 7/00 (2006.01) H04B 1/64 (2006.01) H04B 1/04 (2006.01)

Patent

CA 1079362

ADAPTIVE AUDIO COMPRESSOR ABSTRACT An amplitude, modulated transmitter includes an audio amplifier which, via a radio frequency (RF) power supply modulator, modulates an RF amplifier and carrier. Fluctua- tions in the direct current DC bias to the RF amp, such as are common in mobile applications, vary the modulation index of the transmitted signal. To minimize DC bias affects on the modulation index, the invention contemplates an audio compressor which senses both audio signal level and DC bias level and, in response thereto, controls audio signal compression to maintain the desired percent modulation. Compression is effected by changing the bias on a semiconductor device which, in turn, attenuates audio signals at the input of a fixed gain audio amplifier. A feedback path around the audio amplifier senses both DC voltage and audio signal level and produces an appropriate control signal to bias the semiconductor device, thereby altering audio compression.

269933

Affiliated with

Also associated with

Rating

Adaptive audio compressor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive audio compressor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive audio compressor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-952697