This paper proposes a signal processing methodology of communication system and realized that circuits using operational transconductance amplifier (OTA). Two important classes of communication circuit, delta modulator and compander have been designed using that procedure. In the first implementation coded pulse modulation system is demonstrated which employ sampling, quantizing and coding to c...

The increasing use of mixed signal circuits with analog and digital circuitry on the same lchip have created a set of demands that traditional circuit simuiators cannot meet very well. We pmsent techniques to efficiently handle the simulation of mixed signal analog/digital circuits, a d SYMPHONY , a fast mixed-signal simulator which embodies them. SYMPHONY combines a fast simulator for digital ...

This paper presents a simple circuit technique based on commercially available devices for measuring the amplitude of transient signals. The proposed technique produces digital output proportion to the amplitude of sinusoidal analog input signal without low-pass filter. The realization method employs a peak detector, a comparator, an analog-to-digital converter, and a microcontroller. In additi...

Various RF circuit blocks implemented by using commercially available MEMS digital capacitor arrays are presented for reconfigurable RF systems. The designed circuit blocks are impedance-matching network, tunable bandpass filter, and VSWR sensor. The frequency range of the designed circuits is 0.4-4GHz. The MEMS digital capacitor arrays that are employed in the designs have built-in dc-to-dc vo...

Minimization of multiple output functions of a digital logic circuit is a classic research problem. Minimal circuit is obtained by using multiple Karnaugh Maps (K-map), one for each function. In this paper we propose a novel technique that uses a single Karnaugh Map for minimizing multiple outputs of a single circuit. The algorithm basically accumulates multiple K-Maps into a single K-Map. Find...

Various calculation of matrices and vectors has been used in many digital signal processing systems. Although the calculation simply repeats multiplication and addition, the reiteration processing are usually heavy. Therefore, in order to calculate them with high speed, it is necessary to apply parallel proceccing. Although there is another issue that a circuit area becomes large in the case of...

A single input multi-output voltage mode universal biquadratic filter has been presented. The circuit incorporates digital programmability employing three plus-type differential voltage current conveyors (DVCCs), two grounded capacitors and three resistors. The circuit exhibits high input impedance realizes all the standard filter functions having orthogonal control of cut-off frequency and qua...

Abstract —Neuron circuits have parallel operation features. VLSI implemented Neuron networks are suitable for high speed and low power consumption applications. Digital implementations have good noise immunity while analog neuron circuits have smaller size. This paper presents a mixed-signal neuron design. It uses digital input, output, and weight signals while keeps analog internal operation. ...

We present a novel asynchronous RSFQ digital circuit, Test-Timed RSFQ digital circuit and system(TT), in this paper. With this asynchronous approach, data is transferred in a delay-insensitive fashion to avoid the overhead of global clock distribution and the timing uncertainty. According to the scheme, the timing signal of the logic module is generated by a test logic module. The delay module ...