发明名称 |
COLOR SUBCARRIER GENERATOR |
摘要 |
<p>A color signal processing apparatus, particularly a circuit for generating a color sub-carrier wave for demodulation, used in a color television receiver set to demodulate a carrier color signal to reproduce a color image, is disclosed. The apparatus comprises an oscillation circuit including four differential amplifiers to synthesize oscillation signals having phases which differ 90 degrees from each other to produce a color subcarrier wave, a color-phase adjusting circuit for changing phases of the oscillation signals from the oscillation circuit by changing bias voltages of the differential amplifiers, and a phase detection circuit for comparing the phases of the oscillation signals having the phases changed by the color phase adjusting circuit with a phase of a color burst signal to change the bias voltages of the differential amplifiers in the oscillation circuit depending on the comparison.</p> |
申请公布号 |
CA1074908(A) |
申请公布日期 |
1980.04.01 |
申请号 |
CA19770276174 |
申请日期 |
1977.04.14 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YAMAGUCHI, NAMIO;SATO, YASUYUKI |
分类号 |
H03B27/00;H03L7/08;H04N9/455;(IPC1-7):04N9/46 |
主分类号 |
H03B27/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|