H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 3/00 (2006.01) H03F 3/217 (2006.01)
Patent
CA 2160340
A four quadrant current mode switching amplifier is provided. The switching amplifier includes a pulse width modulator (PWM) (16) programmed by an error voltage derived from an analog input voltage and the amplified output voltage. The PWM is also provided with negative current mode feedback in all four quadrants of operation. A logic device (18) controls the switching topology (20) to source, or sink power for the load and to provide negative or positive output in dependence upon sign and slope bits, derived from the input and output voltages, and the PWM output.
Amplificateur à commutation en mode courant à quatre quadrants. Comprend un modulateur de largeur d'impulsion (PWM) (16) programmé par une tension d'erreur obtenue à partir d'une tension d'entrée analogique et de la tension de sortie amplifiée. Le PWM permet également la rétroaction négative en mode courant dans les quatre quadrants. Un dispositif logique (18) commande à la topologie de commutation (20) de débiter ou d'absorber le courant de la charge et de produire une sortie négative ou positive en fonction des bits de signe et de pente, selon les tensions d'entrée et de sortie, et la sortie du PWM.
Caine Steven Lance
Kimbrough Mahlon Danny
Northern Telecom Limited
Smith Dallas F.
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