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Oscillator circuit and L load differential circuit achieving a wide oscillation frequency range and low phase noise characteristics
Oscillator circuit and L load differential circuit achieving a wide oscillation frequency range and low phase noise characteristics
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机译:振荡器电路和L负载差分电路实现宽的振荡频率范围和低相位噪声特性
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摘要
An oscillator circuit is formed of a differential LC resonant circuit formed of an L load differential circuit including inductance-variable portions and a capacitive element, and a positive feedback circuit formed of N-channel MOS transistors. The inductance-variable portion is configured to vary the inductance by selecting a plurality of switch circuits arranged between a plurality of arbitrary positions on a spiral interconnection layer and the input/output terminal, and thereby can control an oscillation frequency. The inductance-variable portions form an inductor pair when the switch circuit among the switch circuits coupled between the first input/output terminals is turned on together with the switch circuit.
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