ABSTRACT: A CMOS voltage-controlled grounded resistor (VCGR) using a new approach for nonlinearity terms cancellation is proposed. The proposed circuit uses 17 MOS transistors that operate in ohmic region and saturation region. It consists of the voltage attenuator, voltage differential and voltage inverting circuits. These circuits are performed as a voltage dependent source for biasing an ohmic transistor; cancel the nonlinearity terms and threshold voltage in order to compensate the temperature effect. The first order high-pass filter with, tunable a cut-off frequency is presented as an application. The proposed circuit characteristics are high linearity and temperature compensation. The results have been confirmed by PSPICE.
TENCON 2004. 2004 IEEE Region 10 Conference; 12/2004