Duty radio control circuit apparatus

Details Duty radio control circuit apparatus Duty radio control circuit apparatus

1989-12-27

1991-10-15

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307265, 307480, 307490, H03K 522

Patent

active

050577026

ABSTRACT:
An integrating circuit integrates an input signal. When an output from the integrating circuit is input to an AC coupling circuit, only an AC component of the output is extracted. The AC component which passes through the AC coupling circuit is waveshaped and coverted into a rectangular wave by a waveshaping circuit. The duty ratio of the waveshaped rectangular wave is detected by a duty ratio detecting circuit. A voltage corresponding to the duty ratio is then generated and fed back to the output of the AC coupling circuit through a feedback circuit. As a result, a DC bias component is applied to the AC component which has passed through the AC coupling circuit. In this case, the voltage generated by the duty ratio detecting circuit is controlled to coincide with the circuit threshold value of the waveshaping circuit, and a rectangular wave having a duty ratio of 50% is output from the waveshaping circuit.

REFERENCES:
patent: 4475086 (1984-10-01), Allen
patent: 4509494 (1985-04-01), Nishitoba et al.
patent: 4803384 (1989-02-01), Yamane et al.
patent: 4881041 (1989-11-01), Kawanabe et al.
patent: 4891825 (1990-01-01), Hansen
patent: 4968898 (1990-11-01), Hushimi et al.
Sauer, D. J., Design and Performance of a CCD Comb Filter IC; RCA Review, vol. 41, pp. 29, 36-40, published Mar. 1980.

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