Amplifiers – Modulator-demodulator-type amplifier
Patent
1991-09-12
1992-12-08
Mottola, Steven
Amplifiers
Modulator-demodulator-type amplifier
330207A, H03F 338
Patent
active
051701324
ABSTRACT:
The disclosure relates to fast amplification circuits that are designed to provide an output current of some amperes, proportional to an input voltage, and have a frequency spectrum that may go beyond 1 MHz. A linear amplifier follows the fast variations in the input voltage and gives a load all the output current so long as this current is low. As soon as the output current from the linear amplifier reaches a given value, a chopper amplifier gives a current that causes a reduction in the output current of the linear amplifier. The circuit may be applied, in particular, to the control of deflection coils and as a high efficiency amplification circuit for audiofrequencies.
REFERENCES:
patent: 3508109 (1970-04-01), Congdon
patent: 4346349 (1982-08-01), Yokoyama
patent: 4390846 (1983-06-01), Cragfors et al.
patent: 4446440 (1984-05-01), Bell
IEEE Transactions on Power Electronics, vol. PE-1, No. 1, Jan. 1986; pp. 48-54. G. B. Yundt: "Series-or Parallel-Connected Composite Amplifiers".
Lucas Jean-Christophe
Sontag Yves
Mottola Steven
Sextant Avionique
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