Free electronic circuit design and schematic diagram
This is a Programmable Levels High Speed Pulse Generator circuit. This circuit consist of Lilliputian dimensions associated with the sub-micron geometries of many analog and most digital processes also advanced CMOS logic gates or analog comparators. Here is the circuit : The advanced CMOS logic gates or analog comparators is used to create faster digital edges. The sub-micron of digital […]
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This is a simple sawtooth generator circuit. The advantages of this circuit are low cost and produces an auxiliary square wave at the same frequency. This circuit can be used to sweep the frequency of another generator. Here is the circuit : A voltage-controlled current source is formed by IC1 with R1 and Q1. The C1 is discharged by current […]
Read moreThe monostable flip flop is a electronic circuits that is used to produce a single pulse each time it is triggered. Sometimes, this circuit called a ‘one shoot’. This circuit is very useful, for example it can used to produce a delay for timing applications or debounce a mechanical switch so that only one rising and one falling edge occurs […]
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This circuit generates a square-wave which is useful as a clock signal or AC drive for the excitation of sensors. this article presents a square-wave oscillator. This circuit requires no external components unless the bypass capacitor. Figure below shows the circuit, the output frequency and a scope shot of the output waveform. AC-powered subsystems or a square-wave (clock) generator for […]
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Silicon pezoresitive-bridge pressure transducer (SPPT) is very popular in medical, industrial, environmental, and automotive pressure sensor application. The general architecture of SPPT uses a thin micromachined silicon diaphragm incorporates a implanted piezoresitive Wheatson-bridge strain-gauge. The transducer design allows only a small diaphragm deflection sin it has limited elasticity, and this produces only a very small output signal, only about 1% […]
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Photovoltaic transducers has been widely used in medical, consumer, scientific instrumentation, and industrial applications. Photovoltaic sensors is a solid-state devices and available for wide range of wavelength response, cover from infrared, visible, and ultraviolet spectrum. This characteristic make this type of transducer applicable in diverse jobs such as colorimetry, chemical spectral analysis, non-contact thermometry, non-invasive blood-gas monitoring, and flame detection. […]
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In some PLL application, sometimes we need to provide lock indication when the PLL is in locked state. The simplest one is binary indication, 0 or 1 to correspond with lock/unlock condition. This condition should be easy to be presented with a LED lamp. The schematic diagram shows a lock-detection scheme for the CD4046B. The PLL system uses phase comparator […]
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