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# lsli05 - 05-1 05-1 Comparators Function Determine if one...

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05-1 05-1 Comparators Function: Determine if one voltage is larger than another. Types of comparators: Single-Threshold Op-Amp. Output is a voltage. Digital Comparator. Output is a logic level. Hysteresis Op-Amp. Output is a voltage, uses two thresholds. Applications Determine when a voltage exceeds a constant value. Determine when one voltage exceeds another. Et cetera. The comparator output might interrupt a computer or perform other functions. 05-1 EE 4770 Lecture Transparency. Formatted 13:25, 23 December 1997 from lsli05. 05-1

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05-2 05-2 Single-Threshold Op-Amp Comparator + - v o v + - v V S + - V S Here, v + and v - are inputs. Transfer function: H c ( v + , v - ) = V s , if v + > v - ; - V s , if v + v - . Voltage might be useful for controlling other part of circuit. But it’s not in a convenient form for driving logic circuits. 05-2 EE 4770 Lecture Transparency. Formatted 13:25, 23 December 1997 from lsli05. 05-2
05-3 05-3 Single Threshold Example Problem Design a system with output v o = H ( x ) where process variable x is water level, x [0 m , 1 m] , and H

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lsli05 - 05-1 05-1 Comparators Function Determine if one...

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