US 11,588,446 B2 · Signal amplifier circuit, voltage converter and system

Abstract

The invention relates to a signal amplifier circuit for amplifying a signal, in particular an audio amplifier circuit, includes at least one first amplifier transistor (Q1) and at least one second amplifier transistor (Q2), wherein the first amplifier transistor (Q1) and the second amplifier transistor (Q2) are connected to one another in a push-pull circuit and are fed by an amplifier voltage source (V+, V−); and one or more bias diodes (D1, D2) thermally coupled in each case to an associated amplifier transistor (Q1, Q2), wherein the bias diodes (D1, D2) are arranged in a parallel connection with respect to the amplifying transistors (Q1, Q2) to reduce or avoid a crossover distortion, wherein the bias diodes (D1, D2) are fed at least partly by a voltage source (UA) which is independent of the amplifier voltage source (V+, V−). The invention furthermore relates to a system and a voltage converter for providing an output-side DC voltage, including a first transformer (T1) and a second transformer (T2) connected to the first transformer (T1).

Claims16

Dependent claims

A voltage converter for providing an output-side DC voltage, comprising:

input terminals (In) for connecting to a primary AC voltage (2);
output terminals (Out), at which the DC voltage provided is able to be tapped off;
a first transformer (T1) having a first primary winding (T11), which is fed by the input terminals (Out), and a first secondary winding (T12), said first transformer being connected to the input terminals (In);
a second transformer (T2) having a second primary winding (T21) and a second secondary winding (T22), which is connected to a rectifier (3, L, C), said second transformer being connected to the first transformer (T1);
and
the rectifier (3, L, C), which is arranged between the second secondary winding (T22) of the second transformer (T2) and the output terminals (Out) and is configured to rectify an AC voltage present at the second secondary winding (T22) to form the DC voltage provided at the output terminals (Out), wherein the first secondary winding (T12) of the first transformer (T1) is connected to the second primary winding (T21) of the second transformer (T2).

3 more elements

Dependencies are inferred from the claim text.

Signal amplifier circuit, voltage converter and system

Life of this patent

Signal amplifier circuit, voltage converter and system

Life of this patent

Abstract

Claims16