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About Signal Amplifiers
Signal amplifiers are electronic devices that receive and amplify signals for processing or digitization. They produce only a small amount of internal noise and increase signal strength by a significant factor. Signal amplifiers often include field-effect and bipolar junction transistors, electronic components that amplify signals without producing significant amounts of thermal noise. They also include one or more operational amplifiers. Signal inputs include AC and DC voltages, AC and DC currents, charges from piezoelectric devices, and frequencies and other specialized waveforms. Some signal amplifiers receive inputs from accelerometers, thermocouples, thermistors, resistance temperature detectors (RDTs), strain gauges, or bridges. Other devices receive signals from linear rotary differential transformers (LVDTs) and rotary variable differential transformers (RVDTs).
Device specifications for signal amplifiers include the number of analog channels and the number of differential channels. When single-ended outputs are available, suppliers often specify the maximum number of analog channel outputs as twice the number of differential outputs. Differential channels, which have two inputs, define the voltage as the signal to process between the two inputs. Other device specifications for signal amplifiers include maximum output voltage, gain range, bandwidth, and input impedance. Gain, the factor by which input signals are multiplied, is frequently greater than unity; however, gain can be fractional when a reduction (attenuation) of signal amplitude is desired. Bandwidth, the difference between the high and low limits of the frequency response, is a measurement that is typically defined by a variation from a nominal value by a stated value such as 3 dB. Impedance, the resistance to alternating signal flow, is a result of the resistance, capacitance, and inductance of a device’s circuitry. For signal amplifiers, input impedance is typically specified as much greater than the impedance of the devices whose signals are amplified.
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Signal Amplifiers | Business.com Signal Amplifiers Home » Directory » Electronics & Signal Amplifiers Looking for Signal Amplifiers? See Business.com, Inc. Information |
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Welcome to STMicroelectronics Amplifiers & Comparators Analog & Mixed Signal ICs Logic, Signal Switch Memories Microcontrollers See STMicroelectronics, Inc. Information |
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Part Numbers for Signal Amplifiers
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| OP249GP | Amazon | American Microsemiconductor | Industrial & Scientific | OP249GP |
| PN3645 | Amazon | American Microsemiconductor | Industrial & Scientific | PN3645 |
| BA7625 | Newark | MCM | All Supplier Direct Ship | IC, Video Signal Switcher For AV Amplifiers, Number of Inputs: 5, Package: 16 Pin DIP, Voltage: 4.5-5.5 V |
| 2N718A | Amazon | American Microsemiconductor | Industrial & Scientific | 2N718A |
| PN3644 | Amazon | American Microsemiconductor | Industrial & Scientific | PN3644 |
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