Pulse width modulation circuit of programmable subframe system
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United States of America Patent
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-
Dec 3, 1991
Grant Date -
N/A
app pub date -
Aug 29, 1990
filing date -
Aug 31, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A PWM circuit of programmable subframe system includes a control circuit 20 for generating control signals Cm-CO according to the number of subframes, a PWM data register 60 for storing PWM data, a comparison/correction circuit 40 for determining the sequence of connections of the counter and then comparing the value of a counter 30 with the value of the register 60 to generator overflows under the control of the control signals and also simultaneously generate correction signals, a counter 30 for determining the seqence of connections by the circuit 40 and counting-up to return th e overflows to the circuit 40, a CMP OR Gate 70 for OR operating the correction signals generated in the circuit 40, a modulator 50 for setting and resetting the output and giving correction output.
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