... 10.1155/WCN/2006/62905 Charge-Domain Signal Processing of Direct RF Sampling M ixer with Discrete-Time Filters in Bluetooth and GSM ReceiversYo-Chuol Ho, Robert Bogdan Staszewski, Khurram Muhammad, Chih-Ming Hung,Dirk ... 2004.[4] K. Muhammad and R. B. Staszewski, Direct RF sampling mixer with recursive filtering in charge domain,” in Proceed-ings of the International Symposium on Circuits and Systems(ISCAS ’04), ... sam-pling capacitor and the resulting voltage (V= Q/Cs) in- creases with the integration window, thus giving rise to a dis-crete signal processing gain of N.The temporal integration of N...