| Original document(9 pages) 中文版 |
The automatic frequency contrlling (AFC) system presenled by this invention is a direct-current bias unit between the voltage controlling of the frequency discriminator and the modulating oscillator, which provides the terminal of the voltage controlling input with direct-current voltage within a prescribed range. It improves the performance of fast response of the modulator and the demodulator, so that they can work immediately after the power is turned on. In addition, because of using this invented system, the circuits involved in the AFC circuit can attain a good reliability and stability as same as that of the AFC circuit itself. |
Application Number
申请号 |
85107396 |
Application Date
申请日 |
1985.10.07 |
| Title 名称 |
Automatic frequency controlling system used in frequency modulator or demoduclator |
Publication Number
公开号 |
1010513 |
Publication Date
公开日 |
1987.04.15 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
H03L7/00,H04B1/04,H04B1/16 |
Applicant(s) Name
申请人 |
NEC Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
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| Attorney & Agent 代理人 |
XU XINGEN |
| More information 更 多 信 息 |
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