Gain Block Doubles Voltage - Electronic Circuits V: Front-End Conditioning and Gain Contracts Step by Step

An ideal gain block multiplies voltage by the declared exact gain. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

The input is the measured front-end voltage

The gain block input is 4 volts.

V_{\text{in}} = 4\ \text{V}

The declared ideal gain doubles the voltage

The exact gain is 2, so the output is 8 volts.

V_{\text{out}} = 2\cdot 4\ \text{V} = 8\ \text{V}