Where and are the input voltages and is the differential gain.

As differential gain should exceed common-mode gain, this will be a positive number, and the higher the better.

The gray bands emerging from the center off to the lower right and upper left were for differential gain, contrast, and white level.

Differential gain is a special case of gain nonlinearity.

To measure the percentage of differential gain, the standard sawtooth signal with superimposed color carrier is used.

Color carrier superimposed on staircase (differential gain and phase)

Differential gain is a kind of linearity distortion which affects the color saturation in TV broadcasting.

Another element in the graticule is a fine grid at the nine-o'clock, or -U position, used for measuring differential gain and phase.

Within the chart the tools necessary to adjust perspective, framing, linearity, frequency response, differential gain, contrast and white level (brightness) are all provided.

So the phase differences between two consecutive lines (so-called differential phase) are converted to differential gain distortions.

Ideally, a differential amplifier takes the voltages, and on its two inputs and produces an output voltage , where is the differential gain.

Similar to the instrumentation amplifier, isolation amplifiers have fixed differential gain over a wide range of frequencies, high input impedance and low output impedance.

The CMRR is defined as the ratio of the powers of the differential gain over the common-mode gain, measured in positive decibels (thus using the 20 log rule):

The proportional, integral, and/or differential gains of the PLC continuous control feature may be tuned to provide the desired tolerance as well as the rate of self-correction during process upsets.

In the first approximation op-amps can be used as if they were ideal differential gain blocks; at a later stage limits can be placed on the acceptable range of parameters for each op-amp.