Frequency-stabilized two-state modulation using hysteresis contr

Details Frequency-stabilized two-state modulation using hysteresis contr Frequency-stabilized two-state modulation using hysteresis contr

1990-08-15

1994-09-06

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323286, 330 10, 330207A, 363 21, G05F 159

Patent

active

053451651

ABSTRACT:
A two-state modulation system includes a hysteretic comparator with variable thresholds, a two-state processor and an integrating element. A summing circuit combines a signal coupled from the output of the two-state processor, the signal output, the signal input and a delay compensating signal feedback input and a feedback input from an integrating element at the output of the two-state processor. The hysteretic comparator receives a hysteresis control signal that varies the threshold. The hysteresis control signal may be provided by analog switches switched by the switching signal to provide the switched two-state levels to a low pass filter. Rectifying circuitry may also be used for supplying the hysteresis control signal. Limiters and compressors may be connected to the input with the limiter limiting levels tracking the two-state levels, and the compression proportional to the switching frequency.

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Patent Abstracts of Japan, vol. 1, No. 21 (E-76), Mar. 25,1977, p. 849 E 76; & JP-A-51 120 157 cited therein.

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