Glossaries | edulabs.org academy

Thursday, 2 May 2024, 1:20 PM

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Course: Activity Examples (Activity Examples)

Glossary: Electronics (Mike Jaroch)

SENDING END

See INPUT END [10].

SENSITIVITY

(1) For an ammeter, the amount of current that will cause full-scale deflection of the meter. (2) For a voltmeter, the ratio of the voltmeter resistance divided by the full-scale reading of the meter; expressed in ohms per volt [3] [16]. (3) The ability of a receiver to reproduce very weak signals. The greater the receiver sensitivity, the weaker the signal that can be reproduced [17]. (4) Efficiency of a microphone. Describes microphone power delivered to a matched-impedance load as compared to the sound level being converted. Usually expressed in terms of the electrical power level [12].

SENSITIVITY TIME CONTROL

(STC)—A circuit that varies the gain of a receiver as a function of time [18].

SERIES CIRCUIT

An arrangement where electrical devices are connected so that the total current must flow through all the devices; electrons have one path to travel from the negative terminal to the positive terminal [1].

SERIES LIMITER

A diode connected in series with the output, in which the output is taken across the resistor. Either the positive or negative alternation of the input wave is eliminated [9].

SERIES PEAKING

A technique used to improve high-frequency response in which a peaking coil is
placed in series with the output signal path [8].

SERIES-CONNECTED DUPLEXER

A configuration in which the tr spark gap is connected in series in one leg of the transmission line one-half wavelength away from the T-junction [18].

SERIES-DIODE DETECTOR

The semiconductor diode in series with the input voltage and the load
impedance. Sometimes called a VOLTAGE-DIODE DETECTOR [12].

SERIES-FED OSCILLATOR

An oscillator in which dc power is supplied to the amplifier through the
tank circuit or a portion of the tank circuit [9].

SERIES-NEGATIVE LIMITER

A diode connected in series with the output, in which the output is taken across the resistor. It eliminates the negative alternation of the input wave [9].