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An electronic circuit that generates, at a high-impedance output node, an inflowing or outflowing current that is a scaled replica of an input current flowing into or out of a low-impedance input node.



Related Terms

COMPARATOR CIRCUIT

An electronic circuit that produces an output voltage or current whenever two input levels simultaneously satisfy predetermined amplitude requirements; may be linear (continuous) or digital (discrete).

DIAMOND CIRCUIT

A gate circuit that provides isolation between input and output terminals in its off state, by operating transistors in their cutoff region; in the on state the output voltage follows the input voltage as required for gating both analog and digital signals, while the transistors provide current gain to supply output current on demand.

DIODELOGIC

An electronic circuit using current-steering diodes, such that the relations between input and output voltages correspond to AND or OR logic functions.

FEEDBACK CIRCUIT

A circuit that returns a portion of the output signal of an electronic circuit or control system to the input of the circuit or system.

NOR CIRCUIT

A circuit in which output voltage appears only when signal is absent from all of its input terminals.

GROUNDED-GRID AMPLIFIER

An electrontube amplifier circuit in which the control grid is at ground potential at the operating frequency; the input signal is applied between cathode and ground, and the output load is connected between anode and ground.

PHASE SPLITTER

A circuit that takes a single input alternating voltage and produces two or more output alternating voltages that differ in phase from one another.

GATE

A circuit which has two or more input-signal ports and which delivers an output only if and when every input signal port is simultaneously energized. circuit; passive AND gate.

DIFFERENTIAL FREQUENCY METER

A circuit that converts the absolute frequency difference between two input signals to a linearly proportional direct-current output voltage that can be used to drive a meter, recorder, oscilloscope, or other device.

OSCILLATORY CIRCUIT

Circuit containing inductance or capacitance, or both, and resistance, connected so that a voltage impulse will produce an output current which periodically reverses or oscillates.

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