SIGNAL SYNTHESIS CIRCUIT

摘要

A signal synthesis circuit synthesizes luma signals and chroma signals output by a video signal source, to output composite video broadcast signals (CVBS). The signal synthesis circuit includes a first gain adjusting unit, a delay unit, and a second gain adjusting unit. The first gain adjusting unit receives and adjusts the gain of the luma signals from the video signal source, and the delay unit delays phases of the luma signals output by the first gain adjusting unit. The second gain adjusting unit receives and adjusts the gain of the chroma signals from the video signal source so that the luma signals output by the delay unit and the chroma signals output by the second gain adjusting unit can be synthesized into the CVBS.

主权项

1. A signal synthesis circuit comprising:
a first gain adjusting unit configured to receive luma signals from a video signal source and adjust gains of the luma signals; a delay unit coupled to the first gain adjusting unit, the delay unit configured to delay phases of the luma signals output by the first gain adjusting unit, wherein the delay unit comprises a plurality of resonance oscillation units coupled in series; and a second gain adjusting unit coupled to the delay unit, the second gain adjusting unit configured to receive chroma signals from the video signal source and adjust gains of the chroma signals so that the phase delayed luma signals output by the delay unit and the chroma signals output by the second gain adjusting unit are synthesized into composite video broadcast signals (CVBS).