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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.
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
Programmable & variable gain amplifiers (PGA/VGA ...
https://www.ti.com/amplifier-circuit/pga-vga/overview.html
Gains up to 1000V/V and bandwidths to 4.5GHz - get the right gain at the right time. We offer a wide range of variable and programmable gain amplifiers capable of improving the dynamic range of a circuit with the ability to adjust the amplitude of the signal in real time. Our portfolio offers industry-leading zero drift, high-precision solutions with wide range of frequency from …
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 control voltage.
Variable Gain Amplifiers | NXP Semiconductors
https://www.nxp.com/products/radio-frequency/rf-amplifiers-low-medium-power/variable-gain-amplifiers:MC_50948
Variable gain amplifiers (VGAs) adjust audio gain based on control voltage for amplitude modulation, level compression and synthesizers. Our portfolio of digital VGAs includes solutions with high linearity and high output power across a large bandwidth without external matching. They help simplify designs, decrease footprints and offer power savings that can effectively …
Op-Amp Variable Gain Amplifier Circuit - Electronics Notes
https://www.electronics-notes.com/articles/analogue_circuits/operational-amplifier-op-amp/variable-gain-amplifier.php
There are many instances when a variable gain op amp circuit may be required. Although it is possible to place a potentiometer on the output of a circuit, there are more elegant ways in which this can be achieved, maintaining levels of impedance more accurately. The op amp variable gain circuit below maintains input impedance over the range of the gain, providing a distinct …
Programmable Gain Amplifier ICs | Microchip Technology
https://www.microchip.com/en-us/products/amplifiers-and-linear-ics/programmable-gain-amplifier-ics
Audio Compression Amplifier /AGC - ElectroSchematics.com
https://www.electroschematics.com/audio-compressor-agc/
This is an audio compressor/AGC (automatic gain control) with an astonishing 75db input voltage range. A P-Channel JFET is used as a variable resistance element that is applied as a variable attenuator. Distortion is minimized by keeping the signal voltage across the JFET extremely low (1.3mV). This is an improvement over similar circuits that place the …
MAX9814 Microphone Amplifier with AGC and Low-Noise ...
https://www.maximintegrated.com/en/products/analog/audio/MAX9814.html
Description. The MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and low-noise microphone bias. The device features a low-noise preamplifier, variable gain amplifier (VGA), output amplifier, microphone-bias-voltage generator and AGC control circuitry.
Audio Amplifier Circuit - UC Santa Barbara
https://web.ece.ucsb.edu/Faculty/rodwell/Classes/ece2c/labs/Lab%201a%20-%202C%202007.pdf
Audio Amplifier Circuit Overview In the first part of lab#1 you will construct a low-power audio amplifier/speaker driver based on the LM386 IC from National Semiconductor. The audio amplifier will be a self-contained, battery-operated component. In the …
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