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This paper presents a simple and inexpensive implementation of the accurate dual slope analog-to-digital converter (ADC). The proposed technique with positive reference voltage takes advantages of a bootstrap circuit to function as a precise noninverting/ inverting integrator. To achieve the constant reference voltage during integrating analog input voltage interval, a sample/hold (S/H) circuit is...
A simple circuit technique to realize current controlled oscillator (CCO) with two low-impedance input terminals is presented. By suitably setting two input signals, the linear frequency-current relation of the proposed CCO can be either positive or negative slope in the same circuit configuration. The oscillating output frequency proportional to the difference between two input currents can be also...
In this paper, a linearly tunable voltage controlled oscillator with negatively proportional characteristic, termed VCOTheta, is described. Using the VCOTheta and analog PI controller in feedback path of a buck converter operating in continuous condition mode, a control technique with variable switching frequency is presented. No filtering capacitor is required in the proposed technique that provides...
This paper presents an electronic oscillator specially designed to be controlled in oscillation frequency by the control voltage and external bias current signals. The realization technique is simple and inexpensive based on the use of commercial available devices. The proposed circuit consists of operational transconductance amplifiers (OTAs) and an RS flip flop to generate tunable sawtooth and square...
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