Electronics (Mike Jaroch)
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SENDING ENDSee 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 CIRCUITAn 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 LIMITERA 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 PEAKINGA technique used to improve high-frequency response in which a peaking coil is placed in series with the output signal path [8]. | |
SERIES-CONNECTED DUPLEXERA 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 DETECTORThe semiconductor diode in series with the input voltage and the load impedance. Sometimes called a VOLTAGE-DIODE DETECTOR [12]. | |
SERIES-FED OSCILLATORAn oscillator in which dc power is supplied to the amplifier through the tank circuit or a portion of the tank circuit [9]. | |
SERIES-NEGATIVE LIMITERA 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]. | |