Digital controlled low frequency power amplifier
AssigneeContinental Oil Company
InventorsWilliam L. Chapman, Larry L. Newlin
Life of this patent
Estimating the term…
Abstract
An improved digital-controlled power amplifier for low frequency, high power applications. The circuit consists of an alternator with stator windings rewound in a binary sequence for generation of primary power, whereupon pulsed semi-conductive controlled rectifiers are digitally controlled to turn on selected binary combinations of the stator output voltages for summation to produce an output voltage of selected amplitude versus duration; and further, the summed voltage output is switched by a polarity switching bridge to enable generation of a bi-polar output to the circuit load.
Claims6
A power amplifier comprising:
- means for generating a plurality of A-C voltages which are binarily related in amplitude;
- means for rectifying selected ones of said binarily related A-C voltages to produce respective binarily related rectified and filtered voltages;
- means for summing the respective ones of said plurality of binarily related rectified and filtered voltages to provide an output voltage;
- a polarity switching bridge receiving said output voltage, said bridge consisting of first and second controlled rectifiers having common anode connection to said output voltage and having cathodes connected via first and second junctions to anodes of third and fourth controlled rectifiers which have common cathode connection to the output voltage common;
- logic circuit means alternately providing first and second gate outputs for energizing alternately said first and fourth controlled rectifiers;
- commutation circuit means energizable upon alternation of first and second gate outputs from said logic circuit means to generate reverse bypass voltage across said polarity switching bridge to turn off all controlled rectifiers;
- and
- load means connected between said first and second junctions of said bridge configuration to be energized by said output voltage.
Dependencies are inferred from the claim text.