Frequency channel programmable LC_digitally controlled oscillator (DCO) circuit structure
A circuit structure and frequency band technology, applied in the field of programmable LC_DCO circuit structure, can solve the problems of large implementation area and large inductance area of the VCO parallel structure, and achieve the effect of strong design flexibility, reduced implementation area, and reduced implementation difficulty.
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[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0030] As shown in Fig. 6, the present invention is a frequency-band programmable LC_DCO circuit structure, which is characterized in that it is composed of a programmable negative resistance module complementary to a cross-coupled tailless current source, a programmable inductance structure and a switched capacitor array.
[0031] The cross-coupled tailless current source complementary programmable negative resistance circuit structure is characterized in that the cross-coupled tailless current source complementary negative resistance circuit includes two P-type transistors MP1 and MP2, two N-type transistors MN1 and MN2, the gate of the transistor MP1 and the gate of the transistor MN1 are connected to the output terminal OUTBAR, the drain of the transistor MP1 and the drain of the transistor MN1 are connected to the output terminal ...
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