发明名称 |
Spannungsgesteuerter Oszillator |
摘要 |
A voltage controlled oscillator for wide tuning range of frequency with less phase noise has a bipolar transistor (1) provided with a positive feedback circuit between a base (11) and an emitter (13) of said transistor (1), an impedance matching circuit (20) coupled with a collector (12) of said transistor (1) and an output terminal (10), a resistor (8) coupled between the base (11) of said transistor (1) and a control source (14) which provides control voltage for adjusting oscillation frequency of the oscillator. The base (11) of the transistor (1) shows capacitive negative impedance, and an inductive element (2) is coupled with the base (11) of said transistor (1) for oscillation. The emitter (13) of said transistor (1) is grounded for D.C. voltage through an inductor (6) or a transmission line (4), or coupled with a control voltage (16). <IMAGE> |
申请公布号 |
DE69817414(D1) |
申请公布日期 |
2003.10.02 |
申请号 |
DE1998617414 |
申请日期 |
1998.02.11 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORP., TOKIO/TOKYO |
发明人 |
KAMOGAWA, KENJI;NISHIKAWA, KENJIRO;TOYODA, ICHIHIKO;TOKUMITSU, TSUNEO |
分类号 |
H03B1/00;H03B5/12;H03B5/18;(IPC1-7):H03B5/12 |
主分类号 |
H03B1/00 |
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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