Boots – shoes – and leggings
Patent
1984-02-03
1986-12-09
Smith, Jerry
Boots, shoes, and leggings
363 41, 363 42, 318802, 318811, 307265, G06G 716, H02P 1318, H02P 800, H02M 748
Patent
active
046284753
ABSTRACT:
A modulating wave signal whose phase abruptly changes is compared with a carrier signal to generate a pulse width modulation pulse. The carrier signal is a sine wave signal having a frequency n times as high as that of the modulating signal and synchronized with the modulating signal. A phase of the carrier abruptly changes by a factor of n as the phase of the modulating signal abruptly changes. Thus, a pulse with modulation pulse which causes an output voltage of a pulse with modulation inverter to be sinusoidal is generated even if the phase of the modulating wave signal abruptly changes.
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Franke, T. W. "PWM Signal Demodulator with Frequency Drift Compensation" IBM Technical Disclosure Bulletin 12-66.
Frushour and Siderewicz, "Voltage Programmable Delay-Pulse Width Circuit" IBM Technical Disclosure Bulletin 12/66.
Azusawa Noboru
Shiraishi Hisayoshi
Hitachi , Ltd.
Meyer Charles B.
Smith Jerry
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