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PLL (Phase Locked Loop) can be used to make a FM demodulator. PLL circuit track the input frequency by controlling a voltage input of a VCO (Voltage-Controlled Oscillator). Since the VCO is controlled to follow the input frequency, then the controlling signal is directly proportional to the modulating signal. Here is the schematic diagram of …
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Read MoreA schematic diagram of a fast pulse detector is show in the figure below. Error detection rate under 10% can be expected for 60 ns pulse. To get error free performance, it is recommended to use this circuit for detecting 100 ns or wider pulse. [Schematic diagram source: Linear Technology Application Notes]
Read MoreOn the circuit diagram below show us a schematic which is used to set the speed of a low-power induction motor, such as those which can be found in fan applications. Noise coming from TRIAC commutations can be filtered using capacitors C1, C2 and C4. C2 has to be from X2 technology, whereas C1 …
Read MoreMagnetic transducer is usually found in pulse counting application, and we can use this circuit to amplify and convert the signal from the transducer. Here is the schematic diagram of the signal conditioning circuit: [Source: National Semiconductor Application Note]
Read MoreThis free running oscillator employs LM111 comparator. The output of this oscillator is square wave. You can use this square wave oscillator for general purpose. Here is the schematic diagram of the circuit: [Source: National Semiconductor Application Note]
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