Free electronic circuit design and schematic diagram
This is an audio line driver circuit using a TSH22. The advantages of this circuit are low distortion, exhibits a wide bandwidth and an output current sufficient to drive medium impedance loads at a high level modulation. Here is the circuit : This circuit uses two TSH22 that is used in non inverting mode. The gain of this cricuit can […]
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A modulated current is provided by the integrated rotational speed sensor KMI 15/x. This current signal must be converted to ground referenced voltage signal, matching the logic levels of the processing unit for digital signal processing. This signal conditioning can be done by using this circuit. This circuit consist of protective elements to suppress line conducted interference and low pass […]
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These are circuits of high impedance low capacitance buffer and high impedance low capacitance amplifier. First figure is a high impedance low capacitance buffer circuit, it uses the 2N446 JFET that features low input capacitance. The feedback buffer a wide-band unity gain amplifier is made from this 2N446 JFET. Here is the circuit : The second figure is high impedance […]
Read moreThis is JFET sample and hold circuit. In this circuit, the logic voltage is applied simultaneously to the sample and hold JFETs. Here is the circuit : The errors due to rds(on) of the JFETs can be minimized by matching feedback capacitance and resistance and input impedance. The circuit performance is greatly improved because of matched leakage currents of the […]
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3D enhancement is needed to create a fully 3-dimensional sound for most stereo multimedia products. Usually, simple phase-delay circuits is used to produce a widening effect on the perceived sound field. However, there is transaural acoustic crosstalk effect. The following figure shows transaural acoustic crosstalk effect and schematic diagram of simple phase-delay circuits : Transaural acoustic crosstalk effect is a […]
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The digital meters is lack of accuracy and resolution in comparison to drawing information upon a measurement’s rate of change or tracking a reading’s trend. To solve this problem, we should use analog moving-coil meters. Here is the schematic diagram of analog moving-coil meters : This circuit uses 8-inch moving coil meter with a measuring current range from 0 to […]
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This is JFET-bipolar cascode circuit. It will provide full video output for the CRT cathode drive. The gain of this circuit is about 90. Here is the circuit : This circuit employs 2N4091 JFET to solve Miller capacitance problems using cascode configuration. It will alow direct drive from the video detector. The video amplifier will not amplify the 45MHz sound […]
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