Engineer4ever
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HI,
I am designing a differential charge pump, but I was thinking if it's right to use two single ended charge pumps instead of a differential charge pump, beacuse I don't want to use a CMFB circuit, so I am thinking to use two single ended charge pumps; one with input UP and DOWN and the second with input UP-BAR and DOWN-BAR, and each charge pump output will be connected to a loop filter and the outputs of the loop filters will be the differential input of the ring VCO. Is that correct?
I am designing a differential charge pump, but I was thinking if it's right to use two single ended charge pumps instead of a differential charge pump, beacuse I don't want to use a CMFB circuit, so I am thinking to use two single ended charge pumps; one with input UP and DOWN and the second with input UP-BAR and DOWN-BAR, and each charge pump output will be connected to a loop filter and the outputs of the loop filters will be the differential input of the ring VCO. Is that correct?