Bridged driving amplifier and a telecommunication device

Details Bridged driving amplifier and a telecommunication device Bridged driving amplifier and a telecommunication device

1998-04-02

1999-12-21

Pascal, Robert

Amplifiers

Wheatstone bridge with amplifier in at least one arm

330 51, H03F 300

Patent

active

060054379

ABSTRACT:
A bridged driving amplifier for driving a capacitive load comprises a first and a second output terminal, and a first and a second supply rail. A first driving section is coupled between the first supply rail and the first output terminal. A second driving section is coupled between the second output terminal and the second supply rail. A third driving section is coupled between the first supply rail and the second output terminal. A fourth driving section is coupled between the first output terminal and the second supply rail. The bridged amplifier is AC-driven such that the first and the second section, when driven, cause an output voltage across the capacitive load of a given polarity, and that the third and the fourth section, when driven, cause an output voltage across the capacitive load of a polarity opposite to the given polarity. The bridged driving amplifier comprises inhibiting means for inhibiting that at least a part of the supply current is inhibited when the capacitive load is discharged during voltage state changing of the voltage across the capacitive load from the one polarity to the other polarity.

REFERENCES:
patent: 3629616 (1971-12-01), Walker
patent: 4581565 (1986-04-01), Van Pelt et al.
patent: 5631605 (1997-05-01), Bailly
Data Sheet of the UBA 1702 Integrated Circuit, Philips Semiconductors, Jan. 9, 1996, pp. 1-24.

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