发明名称 |
Frequency translation phase-locked loop for separate or intercarrier type television sound detection |
摘要 |
A frequency translation phase-locked loop (PLL) is provided for detecting the audio information from a received television signal. The PLL includes a switching arrangement which, in a first position causes the loop to process the IF picture and sound carriers for detecting the audio information in an intercarrier type of detection method and, in a second position causes the loop to process the IF sound carrier for detecting the audio information without the use of the received picture carrier, in a "separate" (split-sound) type of audio detection method.
|
申请公布号 |
US4511924(A) |
申请公布日期 |
1985.04.16 |
申请号 |
US19820437833 |
申请日期 |
1982.10.29 |
申请人 |
RCA CORPORATION |
发明人 |
GRIFFIS, PATRICK D.;RINDAL, ABRAHAM E. |
分类号 |
H03D3/02;H04N5/60;H04N5/62;(IPC1-7):H04N5/62 |
主分类号 |
H03D3/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|