Free electronic circuit design and schematic diagram
This is a digital isolation and termination circuit. This circuit uses The CLT3-4 that is a digital termination device with quadruple input. The CLT3-4 is designed for 24 V DC automation applications. The CLT3-4 drives an isolating opto-coupler and gives the front-end circuitry of a digital input module (I/O) in industrial automation. Here is the circuit: This circuit has a […]
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The figure below shows a simple embodiment of the analog multiplier. This circuit provides three quadrant analog multiplication which is relatively temperature insensitive and which is not subject to the bias current errors which is plague most multipliers and circumvents many of the problems associated with the log-antilog circuit. By considering A2 as a controlled gain amplifier, amplifying V2, whose […]
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This is a circuit of Voltage-to-Pulse Duration Converter. This circuit is used to convert voltage into pulse duration by combining a timer IC and an OP Amp. This circuit can obtain accuracy up to better than 1%. The output signal is independent of the input voltage and still retain the original frequency. Here is the circuit: [Source: Philips Semiconductors Application […]
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A circuit to shift from bipolar +-5V inputs to TTL signals is shown on circuit diagram below. The comparator inputs is protected by 10Kohm resistors and this is do not affect the circuit operation. [Source: MAXIM Application Note]
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Junction field effect transistors can give exceptionally low input currents when they are used on the input stage of an operational amplifier for ambient temperatures less than about 70’C. However, since it is no simple matter to diffuse high quality FET’s on the same chip as the amplifier , there is no monolithic FET amplifiers available now. Nonetheless, create a […]
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Almost all monolithic amplifiers have good loaded output voltage swings, delivering +-10V at 5 mA with +-15V supplies because they use class-B output stages. It would be require much more current from the integrated circuit, for example, to make the output transistor considerably larger. In addition, the rose dissipation could make troublesome thermal gradients on the chip rising as well […]
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Multiple Feedback (MFB) is the best filter topology to use for differential low pass filters. Here’s the circuit diagram: To design this filter, a corner frequency is chosen based on harmonic content desired in the waveform. After that, we have to select a value of capacitor. The value of C1 is equal to C and C2 is equal to 2.67 […]
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