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PASSIVE LC FILTERS
TUNED AMPLIFIERS AND FREQUENCY
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adjust assortment of test audio signal bandstop filter block diagram BPSK calculated in step capacitor circuit shown cutoff frequency dc control voltage decibel demodulator describe what effect DSBFC modulator farads feedback filter circuit FM demodulator following formula frequency hertz function generator output hertz hookup wire input signal k-ohm resistor leads and hookup line encoding linear integrated-circuit logic lower cutoff frequency lowpass filter measured in step modulating signal observe the operation oscilloscope oscilloscope 10 MHz output signal output waveform parity peak detector phase-locked loop protoboard resonant frequency return-to-zero schematic diagram section is shown semilog graph Set the amplitude shown in Figure signal generator output sine wave Sketch the waveform square wave standard oscilloscope substitution box Summary Write switches test leads time-division multiplexing transistor transmission line tuned amplifier UART upper cutoff frequency VCO free-running frequency VCO output frequency voltage gain voltage-controlled oscillator Vp-p waveform observed