Akira Hyogo

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A linear-in-dB VGA is fabricated in 0.18-µm CMOS technology. It is composed of three cascaded VGAs. Each of them is based on a conventional VGA and a proposed gain control circuit. To avoid devices parameters and temperature behavior on gain characteristics of VGA, a bias circuit is adapted to a proposed gain control circuit. The gain range of 73dB, the(More)
This paper presents a simple, low voltage CMOS OTA circuit based on two voltage buffer circuits. The simulated results of the proposed circuit with 0.18 /spl mu/m CMOS technology show that it can operate with 1.2V supply voltage, and in less than 0.1% THD for 100kHz, 600mV peak-to-peak differential input signal voltage.