Title: Stereo demodulator system

Abstract: A stereo demodulator system includes first and second differential amplifiers differentially responding to a first form of a stereo signal and at least a pair of differentially connected transistors serially connected to the output circuit of the first differential amplifier and responding to a second signal related to the first signal. A current mirror circuit is provided from the output circuit of the second differential amplifier to the pair of differentially connected transistors to produce a mixed output signal at the output terminal of the pair of transistors to separate the stereo signal into component signals. An offset current compensator is provided to avoid producing an offset current in the mixed output signal.

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Inventors: Ohsawa, Mitsuo (Fujisawa, JP)

Application Number: 832896
Filing Date: 1977-09-13
Publication_date: 1979-02-20
Assignee: Sony Corporation (Tokyo, JP)
Primary Class(es): 381/7 329/316
Other Classes:
US Patent Ref:

3573382	Apr, 1971	Feit	179/15.
4049918	Sep, 1977	Ohsawa	179/15.

Other Refs:
Primary Examiner: Olms, Douglas W.
Assistant Examiner:
Attorney: Eslinger; Lewis H., Sinderbrand; Alvin