Driver circuit

Details Driver circuit Driver circuit

1982-07-22

1985-08-13

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330307, 330202, 179 70, 179 77, H03F 304

Patent

active

045353034

ABSTRACT:
In a driver circuit including at least one integrated circuit amplifier, adapted to be interconnected with a subscriber's line of a telephone system, the operating supply for the amplifier includes a pair of series connected voltage supplies having a maximum sum voltage that exceeds the breakdown voltage of the amplifier. The junction of the voltage supplies is connected to a reference, and the amplitudes of the output voltages of the two supplies are controlled in opposite directions with variations in the amplifier input signal to maintain the effective sum voltages of the supplies below the breakdown voltage of the amplifier. The series connected supplies may be employed to supply the input of a similarly connected second amplifier, with the controlled voltage supply of the second amplifier serving to supply the input of the first amplifier. In this latter arrangement, the amplitudes of the supplies of the two amplifiers are commonly controlled.

REFERENCES:
patent: 4100501 (1978-07-01), Nakagaki et al.
patent: 4115739 (1978-09-01), Sano et al.
patent: 4217556 (1980-08-01), Ito et al.
patent: 4329657 (1982-05-01), Kamiya
Younge, Dale R., "Boot Strapping Bias Supply Increases IC Voltage Capacity", Electronics, v. 41, N. 22, 10/28/68, pp. 90-91.

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