Pulse-width modulation circuit and switching amplifier using...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control

Reexamination Certificate

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C327S423000, C327S494000

Reexamination Certificate

active

07102405

ABSTRACT:
A pulse-width modulation circuit converts an input signal into a pulse signal to be supplied to a switch amplifying circuit. The modulation circuit includes a comparison signal generator, an amplitude controller for modulating a comparison signal from the signal generator, and a comparator for comparing the modulated comparison signal and the input signal. The comparator outputs a signal whose level is inverted in accordance with the level of the input signal. The signal outputted from the comparator is supplied to the switch amplifying circuit.

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patent: 6753717 (2004-06-01), Inoue et al.
patent: 6788137 (2004-09-01), Morita
patent: 6828836 (2004-12-01), Barrow et al.
patent: 2003-179445 (2003-06-01), None

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