common-mode signal


Also found in: Wikipedia.

common-mode signal

[¦käm·ən ‚mōd ′sig·nal]
(electronics)
A signal applied equally to both ungrounded inputs of a balanced amplifier stage or other differential device. Also known as in-phase signal.
References in periodicals archive ?
In comparison to their single-ended frequency filter counterparts, differential filters are generally capable to maintain sufficient SNR, are characterized by lower total harmonic distortion (THD), feature high common-mode signal rejection (CMRR), and furthermore with reduced input noise [29].
The device includes a unique common-mode regulation loop to regulate the common-mode signal across the tank.
Alternatively, simpler structures based on etched defected ground structures (DGS) can be used to suppress the common-mode signal.
These filters should be able to produce the desired differential-mode frequency responses and reduce the common-mode signal interference at the same time, which is essential in increasing the signal-to-noise-ratio (SNR) in the receiver and improving the efficiency of the dipole antenna in the transmitter.
The ECG signal consists of three main components: the actual (differential) ECG signal, the differential electrode offset, and the common-mode signal.
The center node is used for accessing the residual common-mode signal.
and the undesired common-mode signal Vcm = (Vin+) - (Vin-)
LCL is measured by applying a common-mode signal to the cable.
If the ratio of the common-mode signal to the differential signal present on the differential transmission line pair and the values for the differential and common-mode impedances are known, the amount of common-mode noise that will propagate through the differential interconnect can be estimated.
However, because each channel must handle the entire signal amplitude, small amounts of noise on top of a large common-mode signal will be difficult to display.
An ADC's common-mode rejection ratio (CMRR) specifies how well it will reject a common-mode signal in the presence of the differential signal you want the ADC to measure.