Title :
Linear, polynomial and exponential ramp generators with automatic slope adjustment
Author :
Jansson, Christer ; Chen, Keping ; Svensson, Christer
Author_Institution :
LSI Design Center, Linkoping Univ., Sweden
fDate :
2/1/1994 12:00:00 AM
Abstract :
A novel method for an automatic slope adjustment of ramp generators is presented. The method has been verified by functional chip implementations of both a linear and an exponential ramp generator in a 2 μm standard CMOS process. Applying start and stop voltages to the ramp generator, the ramp will automatically adjust itself, and the time for a complete ramp is set by the pulse length of a clock signal. Such a ramp generator needs no trimming, and is insensitive to component values and ratios. Ramp forms that are functions of a linear ramp are obtainable, such as linear, exponential, and polynomial increasing ramp shapes
Keywords :
CMOS integrated circuits; calibration; linear integrated circuits; ramp generators; 2 micron; CMOS process; automatic slope adjustment; exponential ramp; functional chip implementations; linear ramp; polynomial ramp; ramp generators; CMOS process; Circuits; Clocks; Image converters; Polynomials; Pulse generation; Shape; Signal generators; Switches; Voltage;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
