Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Reexamination Certificate
2011-08-30
2011-08-30
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Broadcast or multiplex stereo
C381S003000, C381S107000, C381S108000
Reexamination Certificate
active
08009835
ABSTRACT:
A front-end processing circuit applies predetermined processing to an input signal and outputs a processed signal. A frequency modulation circuit applies frequency modulation to the output signal of the front-end processing circuit and outputs a processed signal. The front-end processing circuit includes a variable amplifier and a level detector. The variable amplifier receives a feedback signal and amplifies a signal by an amplification factor corresponding to the feedback signal. The level detector outputs the feedback signal to the variable amplifier in accordance with a level of a signal obtainable in a circuit succeeding the variable amplifier. The front-end processing circuit maintains the signal supplied to the frequency modulation circuit at a constant level.
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Kinoshita Masaki
Takahashi Nobuo
Terada Satoshi
Chin Vivian
Osha • Liang LLP
Sanyo Electric Co,. Ltd.
Suthers Douglas
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