The impedance measured at the input terminal of a filter when the output is properly terminated.
is the load placed on the device driving an input. Ideally the impedance should be "matched" (the same as) the cable over which it is driven to prevent signal reflections that can degrade BER performance.
The impedance between the input terminals of a circuit. Although impedance implies AC characteristics that are affected by inductance and capacitance, most data acquisition specifications simply list the DC component of resistance (see Impedance).
The "load" actually seen by a source connected to an input. In audio, the input impedance should be considerably larger than the connected component's output impedance to avoid signal losses and frequency-response irregularities. In video, the input and output impedance should nearly match.
The opposition to current flow by the first circuits of a device.
The impedance that exists between the input terminals of an amplifier or transmission line when the source is disconnected. The circuit, signal level and frequency must be specified.
The impedance measured at the input terminal of a filter when it is properly terminated at its output terminal.
The resistance measured across the excitation terminals of a transducer at room temperature at the point where there is no load applied and the output terminals are open-circuited.
The impedance of the input terminals of a circuit or device, with the input disconnected.
Opposition to the flow of signal current at the input of a circuit or load.
Instruments often require a high input impedance to prevent their high sensitivity and accuracy from being affected by loading errors. In DPMs 1Megohms input impedance is not unusual.
Resistance to electrical flow measured in Ohms (). Input impedance is the resistance due to inductive, capacitive, and resistive elements measured across the input lines of a board.
the impedance (presented to the excitation source) measured across the excitation terminals of a sensor.
Opposition to current flow through a test instrument, measured in ohms; a high value means less disturbance to the circuit being tested.
An output resistance value of analog voltage (current) output. This describes protective resistance of an output circuit. The value measured with the instrument is the voltage divided by the output's output impedance and the instrument's input impedance. Consequently, the larger input impedance enables measurement of a value closer to the true value.
The measured resistance and capacitance between the input terminals of a circuit.
Impedance presented to the transmitter by the transmission line and its load.
The input impedance or load impedance of a circuit or electronic device is the impedance actually experienced by a signal which is connected to its input.