Pulse shaping system for a pulse width modulation system

Details Pulse shaping system for a pulse width modulation system Pulse shaping system for a pulse width modulation system

1992-05-29

1993-05-04

Grimm, Siegfried H.

Modulators

Pulse or interrupted continuous wave modulator

Pulse width modulator

375 22, 307265, H03K 708

Patent

active

052085597

ABSTRACT:
A pulse shaping system for a pulse width modulation system includes: a ramp generator for generating a ramp signal having a ramp portion and a rest portion; a latch signal generator providing a latch signal coincident with the ramp portion; an indicator circuit for indicating desired pulse width; a pulse edge modulator responsive to the ramp portion and to the indicator circuit for providing a pulse width modulated pulse having at least one of its edges modulated; and including one or both of a fill circuit and a blanking circuit. In response to an indication from the indicator circuit of a desired maximum pulse width, the fill circuit causes the latch signal and the pulse generated by the pulse edge modulator to be combined for producing a maximum width pulse at the full width of the latch signal and the ramp portion. In response to an indication from the indicator circuit of a desired zero pulse width, the blanking circuit causes inhibiting of the pulse generated by the pulse edge modulator during the period of the latch signal and the ramp portion, for producing a zero width pulse during the full period of the latch signal and coincident ramp portion.

REFERENCES:
patent: 4891828 (1990-01-01), Kawazoe
patent: 5045800 (1991-09-01), Kung
patent: 5119045 (1992-06-01), Sato

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