发明名称 |
Optisches Gerät zum Ziehen einer Zwischenfrequenz in einen bestimmten Frequenzbereich. |
摘要 |
In an optical apparatus for pulling an intermediate frequency in a predetermined frequency range, a local oscillation light source (15) is swept in an oscillation frequency thereof in accordance with a signal applied to a frequency adjusting terminal thereof. The signal is of a counted value of a counter (9) which counts pulse signals of an oscillator (18). When an intermediate frequency is pulled in a predetermined frequency range including a predetermined intermediate frequency, the counter (9) is stopped to count the pulse signals, and is controlled to hold a then counted value which will be a fixed driving signal for the local oscillation light source (15). |
申请公布号 |
DE3853969(D1) |
申请公布日期 |
1995.07.20 |
申请号 |
DE19883853969 |
申请日期 |
1988.07.22 |
申请人 |
NEC CORP., TOKIO/TOKYO, JP |
发明人 |
YAMAZAKI, SHUNTARO C/O NEC CORPORATION, MINATO-KU TOKYO, JP |
分类号 |
H03J7/26;H03J7/28;H04B10/148;(IPC1-7):H03J7/28 |
主分类号 |
H03J7/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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