Circuits & Schematics Diodes - 2

11. Informed Analysis Picks Better 555 Timer To Drive Power MOSFET
    Michael Covington
    Circuits Oscillators Supply Diodes NE555
    The original bipolar 555 timer, the NE555 , is excellent for driving a power MOSFET’s gate. Newer CMOS versions such as the 7555, LMC555, and TLC555 use less power, but they have trouble sourcing enough current to drive a gate well and can ...
    Feb 22, 2021
12. Making a Class AB output stage safer
    Circuits Amplifiers Diodes TL431
    A widely-used push-pull configuration of an AB class amplifier is shown in Figure 1, but it needs some improvements. Figure 1. This configuration of an AB class amplifier have some improvements. First of all, let’s take a look how its thermal ...
    Feb 18, 2021

13. 555 timer draws zero off current
    T A Babu
    Circuits Analogue Design Oscillators Diodes NE555
    The growth of battery-operated applications has put steady pressure on designers to steeply reduce their products’ operational power consumption and bring standby power as close to zero as possible by carefully managing the devices’ ...
    Feb 10, 2021
14. Measure RTD Sensors without a Precision Current Source
    Circuits Measurement Diodes DMMT3906W MMBT3904 MMBT3906
    You can achieve accurate resistance-temperature-detector sensor measurements without having to resort to using a precision current source. Traditionally, resistance-temperature-detector (RTD) sensor resistance is measured by applying a precision ...
    Jan 5, 2021
15. Circuit measures currents in dc servo motor
    Shyam Tiwari
    Circuits Measurement Diodes ZXCT1010
    The simple circuit design in Figure 1 lets you measure all components of a current flowing in a dc servo motor. The rectified output of the circuit uses ground as a reference, so you can measure the output by using a single-ended A/D converter. The ...
    Nov 19, 2020
16. Trick a BJT-based converter into starting at only 250 mV dc
    Circuits Supply Diodes ZTX1047 ZTX869
    Electronic Design The converter described below, based on a silicon bipolar-junction transistor (BJT), can operate at as low as 250 mV, which is probably a record for a converter not based on a JFET or germanium transistor. How is this possible? ...
    Oct 13, 2020
17. Multilayer Capacitor Doubles as Varactor
    Susanne Nell
    Circuits Oscillators Diodes CD74HC14
    The main purpose for building the circuit in Figure 1 is to study the idiosyncrasies of X5R, Z5U, and Y5V multilayer ceramic capacitors. The circuit is also an inexpensive VCO (voltage-controlled oscillator) with only five components. Figure 1. ...
    Jan 29, 2019
18. Power supply meets automotive-transient-voltage specs
    Francesc Casanellas
    Circuits Automotive Supply Power Diodes MMBTA42
    Figure 1 shows a power supply that delivers 5 V from a 12 V battery. With only a few components, the supply copes with all the automotive transients that ISO (International Organization for Standardization) 7637-1 lists without the need for a bulky ...
    Feb 20, 2017

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