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The quadrature sinusoidal oscillator employing two voltage differencing tranconductance amplifiers (VDTAs) has been proposed. The condition of oscillation (CO) and frequency of oscillation (FO) can be independently controlled by adjusting the bias current of two VDTAs. The oscillator can provide two output voltages as quadrature waveform and one output current with magnitude controllability. It consists...
This paper presents compact structure of the ladder-based upon fully-differential Log-companding filter in [14]. The proposed filter structure is based on the exponential-state-space integrators with compatible input and output voltage levels. Based upon the proposed structure, the derivation of the all NPN-only 3rd-order fully-differential Log-companding Chebyshev low-pass filter is demonstrated...
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