H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/13
H03F 1/32 (2006.01) H03G 1/00 (2006.01) H03G 1/04 (2006.01)
Patent
CA 1171473
PHD 80087 14 14.1.81 ABSTRACT: Amplifier arrangement. The invention relates to an amplifier arrange- ment comprising at least one emitter-coupled transistor pair, the signal source being included in the emitter line. In accordance with the invention, the non-lineari- ties which occur are mainly caused by the second harmonic and this second harmonic is compensated for in that the base of at least one of the transistors of the pair re- ceives a compensation signal of suitable phase, which sig- nal is derived from the input signal or the output signal of the amplifier arrangement. This results in a multipli- cation process, which causes a second harmonic in the col- lector current of two transistors, which in the case of a suitable phase of the compensation signal at the input exactly compensates for the second harmonic caused by the non-linearity of the circuit. If the transistor pair is employed for gain control, especially for volume control, the direct voltage between the bases of the two transis- tors being varied, the compensation signal should also be varied.
381352
Eckert Wolfgang
Holtkamp Bernd
Kilian Ernst-August
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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