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Activity: Variable Gain Amplifiers [Analog Devices Wiki]
https://wiki.analog.com/university/courses/electronics/electronics-lab-variable-gain-amplifier
A variable-gain or voltage-controlled amplifier is an electronic amplifier that varies its gain depending on a control voltage. This type of circuit has many applications, including audio level compression, synthesizers and amplitude modulation. It can be realized by first creating a voltage-controlled resistor, which is used to set the ...
MT-072: Precision Variable Gain Amplifiers (VGAs)
https://www.analog.com/media/en/training-seminars/tutorials/MT-072.pdf
Figure 1: Variable Gain Amplifier (VGA) Applications . Such a device has a gain that is controlled by a dc voltage or, more commonly, a digital input. This device is known as a variable gain amplifier (VGA), or programmable gain amplifier (PGA). In the case of voltage-controlled VGAs, it is common to make the gain in dB proportional to a linear ...
Variable Gain Amplifiers (VGA) | Analog Devices
https://www.analog.com/en/products/amplifiers/variable-gain-amplifiers.html
Variable gain amplifiers (VGAs) are used in a variety of remote sensing and communications equipment. Variable gain amplifiers deliver unmatched performance for signal chains that require high dynamic range. Applications ranging from ultrasound, radar, LIDAR, wireless communications, and speech analysis have utilized VGAs to deliver industry leadi
Op Amp Variable Gain Amplifier Circuit Design ...
https://www.electronics-notes.com/articles/analogue_circuits/operational-amplifier-op-amp/variable-gain-amplifier.php
The circuit simply uses a single variable gain amplifier. The circuit uses a single operational amplifier, two resistors and a variable resistor. Additionally not only is the gain varied but also the sign. Variable gain op amp circuit. Using this circuit …
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