Variable gain amplifiers often use a mechanical potentiometer to set the gain. An example is a volume control dial. However, when the analog signal path is digitally controlled, a digital potentiometer might be used to control gain. This article discusses the use of the digital potentiometer to form digitally controlled gain or filter blocks.Maxim > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS DIGITAL POTENTIOMETERS Keywords: EPOT Applications: Gain Adjustment in Op-Amp Circuits Nov 28, 2001 APPLICATION NOTE 864 EPOT Applications: Gain Adjustment in Op-Amp Circuits Variable gain amplifiers often use a mechanical potentiometer to set the gain. An example is a volume control dial. However, when the analog signal path is digitally controlled, a digital potentiometer might be used to control gain. This article discusses the use of the digital potentiometer to form digitally controlled gain or filter blocks. General Throughout this discussion of digital potentiometers, the term EPOT is used rather than digital pot, EEPOT or EPOT. The term EPOT describes the Maxim series of vola……