Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-09-22
1977-01-11
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307235B, 307235T, 307228, 328127, 328151, 328185, H03K 410
Patent
active
040029921
ABSTRACT:
A sawtooth wave form generating circuit in which the amplitude of the sawtooth wave form is automatically maintained at a constant value by passing the same through a variable gain amplifier, measuring the amplitude of the sawtooth wave form at the moment when it reaches its maximum value, comparing such amplitude with that of a standard voltage and adjusting the gain of the amplifier accordingly. This is done through the use of a capacitor which is charged upon the occurrence of the same pulse which discharges the capacitor of the sawtooth wave generator. The capacitor controlling the gain of the amplifier is charged under the control of a comparator amplifier having one input from the output of the variable gain amplifier and the other from a source of standard voltage. The sawtooth wave generator is particularly applicable for use in measuring phase differences between two events recurring at a variable repetition rate such as encountered in automobile ignition diagnosis.
REFERENCES:
patent: 3314407 (1967-04-01), Schneider
patent: 3373377 (1968-03-01), Townsend
patent: 3571617 (1971-03-01), Hainz
patent: 3577007 (1971-05-01), Cross
patent: 3650149 (1972-03-01), Howes
patent: 3769598 (1973-10-01), Schauffele et al.
patent: 3808460 (1974-04-01), Mosca
Applied Power Australia Limited
Lange Frederick E.
Miller, Jr. Stanley D.
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