发明名称 |
Tunable astable multivibrator with buffer transistors |
摘要 |
A tunable oscillator circuit provided with a pair of oscillator transistors whose bases are crosscoupled to the opposite collectors, and provided with a capacitance which is arranged between the emitters of the oscillator transistors, each emitter being AC-connected via an emitter current source to a reference voltage is disclosed. In order to considerably increase the tuning range without being limited in the choice of the output amplitude, a pair of buffer transistors in common base configuration is added whose two collectors are connected via a pair of collector resistors to a supply voltage and constitute an output of the tunable oscillator circuit, said pair of buffer transistors arranged in a cascode configuration with the pair of oscillator transistors by being coupled to the collectors of the oscillator transistors.
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申请公布号 |
US4692718(A) |
申请公布日期 |
1987.09.08 |
申请号 |
US19860846532 |
申请日期 |
1986.03.31 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
ROZA, ENGEL;VAN VEENENDAAL, HENDRIK G. |
分类号 |
H03B5/12;H03K3/282;(IPC1-7):H03K3/282 |
主分类号 |
H03B5/12 |
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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