Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reissue Patent
2003-02-25
2010-10-05
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C327S124000, C327S131000, C327S184000, C327S291000
Reissue Patent
active
RE041791
ABSTRACT:
In a pulse generator, a sawtooth-shaped wave generator circuit generates a sawtooth-shaped wave by charging and discharging a capacitor. The sawtooth-shaped wave is fed to a comparator that performs pulse-width modulation on it in accordance with the voltage it receives via a terminal and thereby produces pulses. The comparator has its output grounded through a transistor that is turned on with appropriate timing by the sawtooth-shaped wave generator circuit. Thus, the maximum duty factor of the output pulses is made equal to the duty factor of the sawtooth-shaped wave.
REFERENCES:
patent: 4360747 (1982-11-01), Ryan
patent: 4638255 (1987-01-01), Penney
patent: 5315260 (1994-05-01), Link et al.
patent: 5387882 (1995-02-01), Schoofs
Arent & Fox LLP
Rohm & Co., Ltd.
Wells Kenneth B.
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