Multi-threshold CMOS (MTCMOS) is the most widely used circuit technique for suppressing subthreshold leakage currents in idle circuits. When a conventional MTCMOS circuit transitions from SLEEP mode to ACTIVE mode, voltages of power and ground distribution networks are disturbed. Mode transition noise phenomenon in MTCMOS circuits is examined in this chapter. An MTCMOS circuit technique with th...

In this paper, a CMOS realization of the current differencing transconductance amplifier in the low voltage is presented. CDTA circuit can operate in supply rails down to ±0.75V. The low voltage CDTA performs low power consumption and tuning over a wide current range. The proposed circuit is employed in monostable multivibrator using single CDTA with a few external components. The proposed circ...

We demonstrate a scalable and reconfigurable optical directed-logic architecture consisting of a regular array of integrated optical switches based on microring resonators. The switches are controlled by electrical input logic signals through embedded p-i-n junctions. The circuit can be reconfigured to perform any combinational logic operation by thermally tuning the operation modes of the swit...

An effective technique for mixer LO harmonic rejection in a SAW-less wideband receiver front-end is proposed. The proposed technique provides a tunable notch that can be placed at any frequency like mixer LO harmonics, to avoid the aliasing in baseband after mixing. An analog LC notch is used in a cascode transconductor, and it can reject one of the 3rd or 5th harmonics. T...

A simple object capturing circuit which is based on the biological structure of the superior colliculus and retina is proposed for realizing an artificial saccadic system. The function of the superior colliculus, an afferent and efferent mappings are considered in the circuit. Results of numerical and SPICE simulations reveal that the proposed circuit could shift the gaze toward the target in t...

2. The loaded Q factor must be carefully selected. Plate current in a class AB, B, or C amplifier does not flow for the complete period of an AC cycle and the waveform is maintained by the inertia of the tuned circuit. Too low a Q causes waveform distortion and increased generation of harmonics. As Q is increased, circulating current in the tank circuit is also increased and if made too high, i...

As circuit parametric variations aggravate in advanced technology, yield emerges as an important figure-of-merit in circuit design. Based on a 130nm technology, the yield-energy-delay tradeoffs in low-power circuit optimization are investigated. Using a log-normal statistical model, Monte-Carlo analyses are performed on typical circuit examples, including an inverter chain, NAND gate, and 4-bit...

This paper presents a channel-select filter that employs an active-RC bi-quad structure for TV-tuner application. A design method to optimize the IIP3 of the bi-quad is developed. Multi-band selection and gain adjustment are implemented using switching resistors in the resistor array and capacitors in the capacitor array. Q-factor degradation is compensated by a tuning segmented resistor. A fee...

Neurons in area MT, a motion-sensitive area of extrastriate cortex, respond to a step of target velocity with a transient-sustained firing pattern. The transition from a high initial firing rate to a lower sustained rate occurs over a time course of 20-80 ms and is considered a form of short-term adaptation. In the present paper, we compared the tuning of the adaptation to the neuron's tuning t...

The number of speed-limiting paths in modern digital integrated circuits (ICs) is in the range of millions. Due to un-modelled electrical effects and process variations in advanced fabrication technologies, it is difficult for pre-silicon timing analysis tools to provide accurate delay estimates. Hence, programmable delay elements are commonly inserted in high-performance circuits in order to p...