Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-08-16
1987-06-30
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307519, 307523, 307526, 307527, 307271, 328127, 328 63, H03K 522, H03H 1900
Patent
active
046773223
ABSTRACT:
A voltage comparator (10) includes two sampled input networks connected in arallel between an input reference voltage (Vref) and the inverting input (16) of an integrator (12,14), the other input (18) of which is grounded. The first input network has a first input capacitor (C1) which is through-switched at a first sampling frequency (F1). The second input network has a second input capacitor which is diagonally-switched at a second sampling frequency (F2), thus providing an output voltage to the integrator (12,14) which is of opposite polarity to that of the first network. For a given ratio between the capacitors (C1,C2), the output (15) of the integrator is determined by the relationship between the sampling frequencies (F1,F2), thus providing a comparator capability. Also disclosed is a frequency lock loop (34) in which the output (Vcontrol) of a frequency comparator (38) is filtered of the switching frequencies and utilized as the control voltage for a voltage controlled oscillator (42). The output of the oscillator is then coupled to a switching pulse generator (44) which provides the switching pulses (F2,F2N) to the second input network of the comparator (38).
REFERENCES:
patent: 4496858 (1985-01-01), Smith
patent: 4531106 (1985-07-01), Ganesan
Burson Klye L.
Campbell Scott O.
Ganesan Apparajan
Morrison Ronald A.
American Telephone and Telegraph Company AT&T Technologies, Inc.
Caccuro John A.
Miller Stanley D.
Roseen Richard
Ulbrich Volker R.
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