G - Physics – 05 – B
Patent
G - Physics
05
B
328/168
G05B 1/01 (2006.01)
Patent
CA 1175920
ABSTRACT OF THE DISCLOSURE This invention provides a device for discriminating between two values of a signal with DC offset compensation and an automatic gain control comprising an automatic gain control circuit for receiving an incoming signal to produce a signal having the same polarity as the incoming signal and a signal having the opposite polarity of that of the incoming signal; a first level shift circuit for shifting the same polarity signal; a first peak detection circuit for receiving the output of the first level shift circuit to peak-detect the difference between the shifted same polarity signal and the opposite polarity signal; a second level shift circuit for shifting the opposite polarity signal; a second peak detection circuit for receiving the output of the second level shift circuit to peak-detect the difference between the shifted opposite polarity signal and the same polarity signal; a first feedback path for connecting the output of the first peak detection circuit with the input circuit of the automatic gain control circuit to effect DC feedback; a second feedback path for connecting the output of the second peak detection circuit with the feedback terminal of the automatic gain control circuit to effect automatic gain control; and a comparator for receiving the same polarity signal and the opposite polarity signal to produce a two value discriminated output signal, wherein the DC feedback by the first feedback path is carried out so that the minimum value of the opposite polarity signal coincides with the maximum value of the shifted same polarity signal.
443220
Chujo Takafumi
Murakami Norio
Murano Kazuo
Takahashi Motohide
Tsuda Toshitaka
Fujitsu Limited
Mcfadden Fincham
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