Free electronic circuit design and schematic diagram
Bridge-tied-load (BTL) configuration in an amplifier is basically a H-network with the loud-speaker as the “bridge” between two active valve or switcher. This configuration allow a full alternating current signal to be produced at the load (loudspeaker) without a transformer or a symmetric power supply. Here are some benefits of BTL configuration: No need large capacitor for DC blocking (decoupling) […]
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In automotive environment, it’s common that only single voltage power outlet is available. Using the very popular LM317 voltage regulator IC, we can build a general purpose DC adapter to adapt car’s power outlet voltage (12-14 Volts) to supply small DC devices requiring lower voltage level. On the following schematic diagram for the car power adapter, we can see that […]
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The schematic diagram below show the circuit diagram of an RS232 to RS485 converter circuit. The EIA-485 standard, a.k.a TIA/EIA-485 or RS-485, is a physical layer standard defining the electrical properties of electronic drivers and receivers using balanced digital signal which is capable of handling multipoint systems. The ANSI Telecommunications Industry Association/Electronic Industries Alliance (TIA/EIA) is the organization who publish […]
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Compressor circuit provide high gain for low amplitude input and provide low gain for high amplitude input. This action, in effect, produce a nearly constant amplitude even though the input has very high dynamic range (very high amplitude variation from time to time). The action of compression like this is needed in some situation, such as in maximizing modulation depth […]
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Because the differential input capability of the AD532, algebraic solution of several interesting functions such as difference of squares, (X2-Y2)/10V is allowed. The following figure shows us about the configuration of AD532 in the square mode, with a simple unity gain inverter connected between one of the signal inputs (Y) and one of the inverting input terminals (-Yin) of the […]
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For convenient reading, the display of this tachometer circuit show inthe reading in hertz directly. The conversion time will be equal to the gating time, which is 0.1 second with pin 11 of the ICM7027A connected to Vdd, make the display show tens of hertz at the least significant digit. An ICM7207 can be used with a 6.5536 MHz crystal […]
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Common mode rejection ratio (CMMR) is one parameter that specify the instrumentation performance. LM4250 is high performance op-amp which is characterized by very low power consumption. With special arrangement as shown in the following schematic diagram, the instrumentation amplifier circuit will be featured with calibration to maximize the CMMR performance.
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