Precharge type phase-frequency detector
A frequency and phase detector, frequency and phase detector technology, applied in the field of pre-charged frequency and phase detector, can solve the problems of output signal deviation from standard level, no anti-interference of nodes, current competition phenomenon, etc., to achieve anti-interference Ability to improve and eliminate the effect of output level deviation
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[0011] The improved pre-charged frequency discriminator disclosed in the present invention is further described through examples in conjunction with the accompanying drawings, but does not constitute a limitation to the present invention. The circuit-level simulation of this example uses the TSMC0.18um RFCMOS process and is obtained by using Cadence's SpectreRF in the ADS (Advanced Design Simulation) environment. The power supply voltage of the circuit is 1.8V.
[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings: see figure 2 , The frequency discriminator of the present invention is figure 1 Based on the pre-charged frequency and phase discrimination circuit, the present invention includes two parts of the circuit: one part is the existing frequency and phase discrimination circuit 3, and the other part is the high-impedance elimination connected to the frequency and phase discrimination circuit 3. Circuit 4. fig...
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