Vsd Intern - Analog Comparator Design Using Sky130

What you'll learn
Basics of Analog comparator Circuit design and layout
Integrate Sky130 foundry PDKs with comparator circuit design
Basics of comparator hysteresis characteristics
Requirements
VSD - Circuit design and SPICE simulations
VSD - Custom layout
VSD Intern - Analog Bandgap Reference design using Sky130
Description
A comparator is a device that compares two analog inputs and outputs a digital signal indicating which input is larger. So it has two analog input terminals and one binary digital output. When the difference between two analog input signals approach zero, noise on the inputs will cause spurious switching of digital output. This rapid change in output due to noise can be prevented by hysteresis. Hysteresis is switching the output high or low at different input signal levels. In place of one switching point, hysteresis introduces two: one for rising edge, and one for falling edge of voltage or current. The difference between the higher-level trip value (VH) and the lower-level trip value (VL) equals the hysteresis voltage (HYST).A comparator can be divided into three distinctive pieces - a front-end differential amplifier, amplifier stage and output stage.This comparator consists ofFront-end differential amplifierAmplifier of the output from front-end differential sageNAND gate to act as buffer as well as incorporate the enable pinInverter to act as final buffer before output. The NAND and Inverter improves the slew and provides a little gain.Positive feedback differential set-up.Various Comparator specifications are listed belowropagation Delay -The time difference between the input crossing the reference voltage and the output...

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