Circuits & Schematics Texas Instruments

1. Square-wave modulator has variable frequency and pulse width
   Circuits Oscillators Texas Instruments SN74LS123
   A few years ago, I worked at a disk-drive company. We had a plating facility that required square waves to drive the high-voltage plating operation. The challenge was that the square wave's pulse width had to be variable, along with the duty ...
   13-01-2021
2. Circuit checks «swamp-cooler» water level
   Circuits Automation Texas Instruments CD4093B
   A “swamp cooler” is an easy way to obtain effective air conditioning, especially in hot and dry climates, if a water source is readily available. Although most units are very reliable, the storage-reservoir control usually uses a single ...
   22-12-2020
3. Quasiresonant converter uses a simple CMOS IC
   Circuits Supply Texas Instruments CD4093B
   Figure 1 shows a flyback power supply that has low noise and uses a simple CMOS CD4093 IC for its control. The electrical noise of a converter arises mainly when current switches on. Diode recovery and charging parasitic capacitances create high ...
   16-12-2020
4. Simple circuits sort out the highest voltage
   Circuits Analogue Design Measurement Texas Instruments TL084 LM324
   In a water-cooled power converter, analog-output sensors measure the cooling water temperature at three locations. If any of the three temperatures rises above a preset threshold, an alarm sounds and attracts the attention of the system's ...
   14-12-2020

5. Rectifier tracks positive and negative peaks
   Circuits Analogue Design Texas Instruments TL072
   Signals ranging from music to complex control-system waveforms may contain unequal positive and negative peak amplitudes. An envelope-follower circuit can track unequal peaks, but the ability to select a desired peak can enhance the circuit's ...
   11-12-2020
6. Circuit compensates optocoupler temperature coefficient
   Circuits Analogue Design Texas Instruments LM358
   When using an optocoupler in a linear application, you should consider its gain drift with temperature. Traditional single- and dual-transistor-output devices have a notable gain drift with temperature. In recent years, some temperature-compensated ...
   11-12-2020
7. Circuit breaker monitors leakage current
   Circuits Security Power Texas Instruments LM319A
   The residual-current circuit breaker in Figure 1 continuously monitors the supply lines for any leakage current and immediately disconnects the supply if necessary. Load-supply wires, both live and neutral, pass through the magnetic core of the ...
   05-12-2020
8. Circuit safely applies power to ICs
   Circuits Supply Texas Instruments LM3722
   Supervisory circuits normally monitor a microprocessor's supply voltage, asserting reset to the IC during power-up, power-down, and brownout. In this way, the circuit ensures that the supply voltage is stable before the microprocessor boots, ...
   13-11-2020
9. Circuit forms adjustable bipolar clamp
   Circuits Analogue Design Texas Instruments TL082
   The easy way to clamp a signal to a given value is to use two zener diodes, connected back-to-back. This method has several disadvantages. The accuracy of the clamping depends on the tolerance of the zener diodes, and the clamping is not ...
   13-11-2020
10. Feedback circuit enhances phototransistor's linear operation
    Circuits Analogue Design Measurement Texas Instruments TL082
    A designer who uses a phototransistor to convert a modulated optical signal to an electrical signal frequently encounters problems when high-intensity background light saturates the phototransistor. When its base terminal floats, a ...
    07-11-2020

Sort by: relevance / date