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This paper proposes a modified, inverter based transconductor using double CMOS pair for implementation of biquad Gm-C low-pass filter with bandwidth tunable from 100 kHz to 20 MHz. This bandwidth range meets the requirements of zero IF receivers for wireless applications. Major contributions of this paper are proposal for operating the Gm stage in sub-threshold region so as to minimize the power...
This paper proposes a modified, inverter based transconductor using double CMOS pair for implementation of Gm-C filters . The advantage of this scheme is that, instead of varying the power supply, the bias voltages at high impedance nodes are varied for frequency (F) tuning. A current steering DAC is proposed for controlling these bias voltages. Another major contribution of this paper is the use...
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