Transconductance Amplifier
This circuit is a Voltage-to-current Converter . Here's how it permits an input voltage to control the brightness
of an LED
R3 controls Vin , Vary R3 to alter Iout, hence the brightness of the LED.
Transimpedance Amplifier
Example : If R1 = 1000 Ohms then Gain = -1000
This circuit is a current -to-voltage converter. Here's how it transforms the current generated by a solar cell into an output voltage :
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This circuit can amplify the signal from non-current generators like thermistors and photoresistors. connect one side of device to +9V and the other to pin 2 , ground pin 3.
