H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/38 (2006.01) H03F 1/32 (2006.01) H03F 3/20 (2006.01)
Patent
CA 2099216
ABSTRACT OF THE DISCLOSURE The disclosure relates to the linear power amplification, in a single channel, of a composite signal formed by two independent signals. In a single channel formed by correction means followed by a linear preamplifier followed by a saturated amplifier, the filtering and symmetry effect produced, both in the correction means and in the amplifier, is profitably used to compensate for the clipping due to the amplifier. This makes it possible to obtain undistorted output signals whose amplitude exceeds the level of saturation of the amplifier. The compensation makes it necessary for the transfer characteristic of the correction means to have a given slope between two points beyond which the saturation appears in the amplifier and a slope that is substantially thrice the given slope on each side of these two points. Application especially to television.
Goudreau Gage Dubuc
Thomson-Lgt Laboratoire General Des Telecommunications
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