Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1985-11-27
1988-09-06
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328134, 307519, 307234, H03K 500, H03K 906
Patent
active
047696117
ABSTRACT:
Circuitry for sensing frequency over time of a signal that has zero crossings. A first circuit commences generation of a periodic waveform in response to at least some of the zero crossings. A bistable circuit connected to the waveform commencing circuit produces a first electrical level in response to a zero crossing and, upon the occurrence of a predetermined change in the waveform, produces a second electrical level until a subsequent zero crossing occurs. A third circuit low-pass filters the electrical levels from the bistable circuit to produce an output which is a function of the frequency of the signal. Methods for sensing frequency over time of a signal that has zero crossings are also disclosed.
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"Voltage Regulator Rated 3.5 Amp", Diesel Progress North American, p. 18, undated.
Basler Electric Company
Callahan Timothy P.
Miller Stanley D.
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