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We had proposed a new switched-capacitor (SC) analog correlator using balanced charge pump circuit for Code Division Multiple Access (CDMA) bus interface. The proposed circuit operates at 100 MH and dissipates 0.9 mW using 3.3 V supply voltage. We have studied the tradeoff between speed, power and input resolution of the level shifter of the analog correlator. The mismatch of the level shifter limits...
A switched-capacitor analog correlator using balanced charge pump circuit, capable of pumping same amount of charge in positive and negative direction is proposed for code division multiple access (CDMA) bus interface. In addition, the amount of charge injection is independent of the output voltage. The proposed charge pump circuit is applied to the analog correlator in the receiver module of CDMA...
An auto-sensitivity control circuit using analog topology for wired CDMA bus interface is proposed. Because, the bus capacitance is directly proportional to the number of transmitter/receiver pairs, the receiver circuit of CDMA requires different sensitivities for different number of transmitter/receiver pairs. We proposed an analog circuit that controls the effect of using different number of transmitter/receiver...
In spread spectrum communication receivers a matched filter can be used as the correlator for acquisition and tracking of synchronization. For a mobile communication terminals large power consumption of the matched filter is serious problem because total power consumption is limited. We proposed a new analog matched filter using sample-and-hold (S/H) circuit, which performs correlation operation in...
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