发明名称 |
Voltage-controlled oscillator using a surface elastic wave resonator |
摘要 |
A Colpitts oscillator has an integrated circuit. The integrated circuit includes a transistor having an equivalent large size, a bypass capacitor connected between a collector of the transistor and a ground, a first feedback capacitor connected between a base and an emitter of the transistor, a second feedback capacitor connected between the emitter of the transistor and the ground, and an emitter follower connected to the emitter of the transistor. In a package, a stray reactance and a bonding wire are designed so as to agree with an element value and a Q value which can be used as parts of a resonator. A surface elastic wave resonator disposed outside the integrated circuit is connected between the base of the transistor and the ground. The oscillator is voltage controlled by a variable capacitance diode connected in series with the resonator.
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申请公布号 |
US5025229(A) |
申请公布日期 |
1991.06.18 |
申请号 |
US19900528079 |
申请日期 |
1990.05.24 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
HASEGAWA, MAKOTO;TAKAHASHI, KAZUAKI;MAKIMOTO, MITSUO;TAKAHASHI, MASAO;SHIMAZU, TAKAYUKI |
分类号 |
H03B5/30;H03B5/32;H03B5/36 |
主分类号 |
H03B5/30 |
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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