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This paper presents a simple circuit technique to reduce gain variability with temperature in cascode amplifiers using a body-biasing scheme, and at the same time, enhance the overall gain of the amplifier. Simulation results of a standard telescopic-cascode amplifier, in two different nanoscale CMOS technologies (130 nm and 65 nm) show that it is possible to obtain supply-and-temperature-compensation...
Robustness of modern ICs during system assembly and normal operation requires that protection circuits are built-in to prevent damage to internal circuit elements due to Electrostatic Discharge events (ESD), which can inject substantial energy into the chip. ESD protection as well as protection against other damaging events, such as latchup, is highly dependent on chip architecture and circuit design,...
A new technique to enhance single-stage operational transconductance amplifiers (OTAs) is presented. Enhanced DC gain and reduced input parasitic capacitances are achieved by employing two input fully-differential voltage combiners, i.e. a combination of transistors in common-drain and common-source configurations operating as a preamplifier stage. Simulation results show that the input capacitance...
We present a design and simulation results of an integrated circuit dedicated to recording and detection of a broad range of biomedical signals. The chip is designed in a 180nm CMOS technology and occupies 1.5×1.5 mm2. It consists of 8 channels responsible for amplification, filtration, and detection of biomedical signals. Main parameters of the single recording channel such as a voltage gain, frequency...
This paper addresses the problem of generating non-overlapping clock phases for switched capacitor circuits at more than 1 GHz clock frequency. A simple clock phase generator providing two non-overlapping phases with low values of RMS period jitter, RMS jitter of phases' widths and phase shift of 180 degrees is proposed. The circuit relies on a back-to-back inverter structure. Simulation results over...
A novel high speed and tunable transconductor suitable for analog and mixed-signal fuzzy circuits operating in current mode and a high linear MIN circuit are proposed. Using this OTA, we construct are high speed Gaussian and trapezoidal-shaped fuzzifier and implement S-shaped and Z-shaped function with all parameters (slop, width, and position) independently and continuously tunable, and excellent...
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