ADDING VOLTAGE WITHOUT USING AMPLIFIERS IN A FEEDBACK LOOP
Original Publication Date: 2001-Apr-23
Included in the Prior Art Database: 2001-Apr-23
In analogue circuits adding two voltages is an often-needed operation. Usually this is done using operational amplifiers and resistors. Operation amplifiers are expensive because they need a significant chip area for the frequency compensation capacitor. The circuit described offers a solution to the problem of adding voltages without the need of an operational amplifier with its large capacitor.