DESIGN OF A HIGH PRECISION, WIDE RANGED ANALOG CLOCK GENERATOR WITH FIELD PROGRAMMABILITY USING FLOATING-GATE TRANSISTORS

DESIGN OF A HIGH PRECISION, WIDE RANGED ANALOG CLOCK GENERATOR WITH FIELD PROGRAMMABILITY USING FLOATING-GATE TRANSISTORS

Garima Kapur1, C.M Markan2 and V. Prem Pyara3
1&2 Department of Physics and Computer Science, Dayalbagh Educational Institute, INDIA 
3Department of Electrical Engineering, Dayalbagh Educational Institute, INDIA 

ABSTRACT

This paper presents a circuit of a high-precision, wide ranged, analog clock generator with on-chip programmability feature using Floating-gate transistors. The programmable oscillator can attain a continuous range of time-periods lying in the programming precision range of Floating Gates. The circuit consists of two sub circuits: Current Generator circuit and Wave Generator circuit. The current of current generator circuit is programmable and mirrored to the wave generator to generate the desired square wave. The topology is well suited to applications like clocking high performance ADCs and DACs as well as used as the internal clock in structured analog CMOS designs. A simulation model of the circuit was built in T-Spice, 0.35µm CMOS process. The circuit results in finely tuned clock with programmability precision of about 13bit [1]. Simulation results show high amount of temperature insensitivity (0.507ns/°C) for a large range of thermal conditions. The proposed circuit can compensate any change in temperature. The circuit design can be operated at low supply voltage i.e., 1v.

KEYWORDS

Square wave generator, floating gate FET, field programmability

Original Source Link : http://aircconline.com/vlsics/V1N3/0910vlsics05.pdf
http://airccse.org/journal/vlsi/vol1.html