By submitting this form, you are agreeing to the Terms of Use and Privacy Policy.
A transconductance amplifier is an amplifier that generates an output current from a differential input voltage. The amount of current entering the control current pin determines the transconductance gain.
The Global Transconductance amplifiers market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
The 52120A Transconductance Amplifier from Fluke Calibration extends the calibration range of a variety of power and energy metres, clamp metres, current transformers, and Rogowski coils (such as the Fluke i6000 iFlex) up to 6000 A. Device calibration is exact because of its industry-leading amplifier accuracy.
In the frequency range from dc to 100 kHz, the Model 8200 Transconductance Amplifier generates an output current that is directly proportional to the input voltage. It is a precision, high stability, and high accuracy device.
Two current-controlled operational transconductance amplifiers with differential inputs and push-pull outputs are present in the AU5517 and NE5517. For many types of programmable gain applications, the AU5517/NE5517 offers considerable design and performance advantages over comparable devices.
The RoCoil TCA-5, a three-channel integrating transconductance amplifier from DENT Instruments, is now available and simulates a conventional current sensing transformer by converting the electrical output signal from the RoCoil current sensor to a 5 amp AC current. Applications using power metres with 5A current transformer inputs can benefit from the flexibility and simplicity of installation offered by the RoCoil flexible current sensors thanks to the DENT RoCoil TCA-5.
TEXAS INSTRUMENTS OPA860 – The OPA860 is a versatile monolithic component performance video, RF and IF circuitry. It includes a wideband, bipolar operational transconductance amplifier (OTA), and voltage buffer amplifier.An ideal transistor is the OTA, or voltage-controlled current source.
It has three terminals, a high impedance input (base), a low impedance input/output (emitter), and the zero base-emitter voltage at the moment, just like a transistor. An output current that is bipolar and centered around zero is produced by AC inputs that are centered about zero. An external resistor can be used to alter the OTA’s transconductance, with optimal trade-offs.
The OPA860 pulses, fast control loop amplifiers, and control amplifiers for capacitive sensors and active filters serve as a fundamental building block. An SO-8 surface-mount package is available for the OPA860.Achieving optimum performance with a high-frequency amplifier like the OPA860 requires careful attention to board layout parasitics and external component types.
LT1228 – The LT1228 makes it easy to electronically control the gain of signals from DC to video frequencies. The LT1228 implements gain control with a transconductance amplifier (voltage to current) whose gain is proportional to an externally controlled current. A resistor is typically used to convert the output current to a voltage, which is then amplified with a current feedback amplifier.
The LT1228 combines both amplifiers into an 8-pin package, and operates on any supply voltage from 4V (±2V) to 30V (±15V). A complete differential input, gain controlled amplifier can be implemented with the LT1228 and just a few resistors.
The LT1228 current feedback amplifier has very high input impedance and therefore it is an excellent buffer for the output of the transconductance amplifier. The current feedback amplifier maintains its wide bandwidth over a wide range of voltage gains making it easy to interface the transconductance amplifier output to other circuitry.
The current feedback amplifier is designed to drive low impedance loads, such as cables, with excellent linearity at high frequencies. The LT1228 transconductance amplifier has a high impedance differential input and a current source output with wide output voltage compliance. The transconductance, gm, is set by the current that flows into Pin5, ISET.
The small signal gm is equal to ten times the value of ISET and this relationship holds over several decades of set current. The voltage at Pin 5 is two diode drops above the negative supply, Pin 4.
