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Title: Low power consumption stereo transmitter and receiver system
Abstract:
A low power consumption, compact portable stereo radio transmitter and a receiver therefor, the transmitter having two audio processing channels each for receiving inputs from two stereo pickup stations and including amplifier circuits with selector switches providing a mode of even harmonic generation, a mode of odd harmonic generation, and a mode of undistorted amplification, a 38 KHz oscillator, flip flop coupled to the oscillator to provide a 19 KHz pilot signal, a difference amplifier and a balanced mixer to produce a double-sideband suppressed carrier signal centered on 38 KHz, and an amplifier for combining the balanced mixer output, the pilot signal and the two channel output and modulating a carrier signal. The receiver includes amplifier, detector, and decoder circuitry to receive the radio signals from the transmitter and produce stereo audio signals for driving a standard stereo amplifier.
Other info: Inventors: Majefski, Richard L. (Combs, AR, US) Application Number: 454018 Filing Date: 1974-03-22 Publication_date: 1976-01-20 Assignee: Primary Class(es): 381/14 455/91 Other Classes: US Patent Ref:
Other Refs: Other References: Albert S. Jackson, "Analog Computation" (1960) pp. 38, 49, 196. | |