可变增益放大器通常使用机械电位器来设置增益。一个例子是一个音量控制旋钮。然而，当模拟信号路径数字控制，数字电位器可能被用来控制增益。本文讨论了数字电位器的使用，形成数字控制增益或过滤块。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……
