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2025-01-27 03:21本頁(yè)面
【正文】 oscillation circuit, this design USES the varactor diode as a voltage controlled variable point of ponent, so that it can form LC voltagecontrolled oscillator. Early voltagecontrolled element variable reactance is the reactance tube, then mostly use the varactor. At microwave frequencies, with reflector voltage control reflex klystron oscillator frequency with the anode voltage control frequency magron oscillator and so on also belong to the nature of the voltagecontrolled oscillator. In munication technology, measurement technology, puter technology and other areas, often have to use precision is high, high frequency stability and convenient adjustable signal source, voltage controlled oscillator is now very widely used class of electronic devices for the electric light switch circuit, mobile handheld devices, etc. Provides a good solution. Key word: VCO voltage controlled oscillator, LC VCO, RC, voltage controlled crystal oscillator VCO the LC voltagecontrolled oscillator Among various kinds of oscillation circuit, LC oscillation circuit is one of the more mon. Commonly used LC oscillator has the following kinds: 1: in the form of mutual inductance coupling oscillator. Adjustable base circuit oscillation frequency in a wider scope of changes, the amplitude is stable. Adjustable power road can only solve the problem of starting oscillation condition and the oscillation frequency, can39。 Electronic clock and electronic watches using high frequency stability of the oscillating circuit as timing ponents, etc. In munication system circuit, voltage controlled oscillator (VCO) is the key ponents, especially in the phaselocked loop circuit, clock recovery circuit and frequency synthesis apparatus such as circuit is Paramount, i
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