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This paper presents a novel high-linearity and low-consumption BiCMOS frequency-to-voltage (F/V) converter which is composed of three operational amplifiers (OAs) A1, A2 and A3, in which A1 and A2 are common-source CMOS OAs, but A3 is a low-pass filter (LPF) which adopts the BiCMOS technology. The component parameters of the entire converter are optimized and some measures such as raising speed and...
A 1.2-V piecewise curvature-corrected CMOS bandgap reference (BGR) is proposed. It features in utilizing piecewise nonlinear curvature-corrected current and rail-to-rail operational amplifier to a conventional first-order current-mode BGR. The corrected current is zero, exponential with temperature and proportional to the squared temperature in the lower, middle and higher temperature range (TR)....
A kind of novel CMOS optically coupled isolation amplifier (OCIA) composed of two operational amplifiers (OAs) is present. To improve the linearity and reduce the power consumption, the negative feedback signal is introduced to the input loop through two photoelectric coupled devices. Besides, other improvement actions are taken in this amplifier. Experimental results show that compared with the BiCMOS...
A piecewise curvature-corrected bandgap reference (BGR) is presented. It features in utilizing a piecewise curvature-corrected current generator and an operational amplifier biased by a current proportional to absolute temperature (PTAT) to a conventional first order BGR. The piecewise current corrects the nonlinear temperature term of the first-order BGR in the higher temperature range (TR). The...
In this paper, a full CMOS six-order Gm-C Chebyshev filter based on passive LC-ladder synthesis is designed in TSMC standard 0.25mum CMOS process, which uses a highly linear operational transconductance amplifier (OTA) based on cross-coupled differential pairs, which exhibits a wide product of gain and bandwidth. A common-mode feedback (CMFB) with improved stability is introduced. The simulated results...
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