Switching bridge amplifier

Details Switching bridge amplifier Switching bridge amplifier

1992-01-17

1992-10-20

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330297, 330104, H03F 345

Patent

active

051573474

ABSTRACT:
Bridge amplifier circuit including a linear amplifier stage (3) which in single-ended configuration drives a load (13). Once the output voltage (U.sub.0) at the output (7) of the amplifier stage (3) has reached the maximum or minimum output swing limit, the voltage on the load terminal (14) remote from the output (7) is either reduced or increased by a switch circuit (15) in response to control signals (36) originating from control means (37) in dependence on the input signal (U.sub.i) and/or the output signal (U.sub.0). The switch circuit (15) includes a bidirectional switch (16) arranged as two controllable diodes (90, T.sub.11) connected in anti-parallel and having very little forward bias. Compensating voltage jumps at the output (7) of the amplifier stage (3), which require a high slew rate, are avoided in this manner.

REFERENCES:
patent: 4330756 (1982-05-01), Moreau
patent: 4339730 (1982-07-01), Yokoyama
patent: 4713629 (1987-12-01), Segal

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