Analog Integrated Circuits and Signal Processing

An analog part of a digital-video quadrature demodulation scheme is built using a 7 GHz, 0.8 μm biCMOS process. The scheme provides for 1–10 MHz cutoff frequency and 0–20 dB gain controls and dissipates 250 mW from a power supply of 5 V. The channel ...

This paper proposes an automatic tuning system to adjust frequency characteristics of integrated continuous-time filters especially at high frequencies. Frequency characteristic deterioration of a filter using integrators with electrically controllable ...

A new universal voltage-mode second-order filter circuit is presented. The circuit uses five current-feedback operational amplifiers, two grounded capacitors three grounded resistors and three floating resistors. The circuit can realize all the standard ...

Low-power wide-dynamic-range systems are extremely hard to build. The biological cochlea is one of the most awesome examples of such a system: It can sense sounds over 12 orders of magnitude in intensity, with an estimated power dissipation of only a ...

Resolvers have long been known as transmitters of angle information. This information is contained in the output sine and cosine functional voltages of the resolver, which are then converted angle codes by the resolver-to-digital converter. The majority ...

Current-mode techniques have been used to realize improved basic building blocks of elementary piecewise linear (PWL) functions. These alternative circuit implementations, used for synthesis of precision PWL transfer characteristics, are described and ...

A Fourier-series model is presented for the capacitance-voltage characteristic of a MOS gate capacitor using transistors biased in the strong inversion or the accumulation region. Using this model closed-form expressions are obtained for predicting the ...