We know from Ohm’s law that voltage is equal to current times resistance, and in fact, an ordinary resistor can be used as a current-to-voltage converter-if you connect a resistor to a current source, the resistor will generate a voltage that is equal to the current multiplied by the “gain,” i.e., the resistance. The current-to-voltage amplifier can be described as having a gain, because the output amplitude is equal to the input amplitude multiplied by a number chosen by the designer, but it’s a different type of gain because the output signal and the input signal have different units and therefore cannot be directly compared.Ī current-to-voltage amplifier is also called a transimpedance, or transresistance amplifier, and this reminds us that the circuit is performing the same basic function as a resistor. However, an important variation on this basic amplification scheme involves conversion from current to voltage. ![]() ![]() We usually think of an amplifier as something that receives an input voltage and produces a higher-amplitude output voltage.
0 Comments
Leave a Reply. |