Circuits & Schematics: Design - 2

11. Virtual-zener circuit simplifies high-voltage interface
    Circuits High Voltage Signal Processing, Filters Analog Devices LT1021
    .. design for a photonic switch needs more than approximately 70 V at the cathode of a duo-lateral optical ...
    01-04-2024

12. A new and improved latching power switch. Part 1
    Circuits Supply Texas Instruments LM393 TLC393
    .. previous Design Idea [ 1 ] outlined a relatively simple circuit in which a momentary pushbutton could be made to function ...
    28-03-2024

13. Supersized log-scale audio meter
    Circuits Audio Measurement Texas Instruments TL084 LM385
    .. D3/R4 bootstrapping R3 to give a linear fall in voltage equivalent to 20 dB in 1.7 s, which, more by happy accident than by design, is exactly what we want. Now we pass the signal through D4, whose tempco of about 2 mV/ C compensates for ...
    21-03-2024
14. High-power LED drivers require no external switches
    Circuits Supply Light Maxim MAX1685 MAX4162 MAX5035
    .. source. For LEDs with currents greater than 0.35 A, an inductive switching regulator is usually the best choice. This Design Idea presents a series of circuits based on single-power-IC switching regulators, with efficiency and ...
    20-03-2024
15. Efficient voltage doubler is made from generic CMOS inverters
    Circuits Supply Texas Instruments SN74AC14
    .. a design needs auxiliary voltage rails and the associated current loads are modest, capacitor pump voltage multipliers ...
    14-03-2024
16. ∆Vbe differential thermometer needs no calibration
    Circuits Analogue Design Measurement Texas Instruments CD4053B TLV2374
    .. heatsinks, thermoelectric coolers (TECs), and thermal control in electronic assemblies. Figure 1 illustrates an inexpensive design for a high-resolution differential thermometer utilizing the ∆V BE effect to make accurate measurements with ...
    06-03-2024
17. Hotwire thermostat: Using fine copper wire as integrated sensor and heater for temperature control
    Circuits Automation Analogue Design Measurement STMicroelectronics TSB712
    .. are based on separate temperature sensor and heater devices with means for feedback between them. But in some recent EDN design ideas (DIs) we’ve seen thermostat designs that meld the functions of sensor and heater into a single ...
    04-03-2024
18. Fast-settling picoammeter circuit handles wide voltage range
    Circuits Analogue Design Measurement Analog Devices AD795 OP1177
    .. an unknown current from a feedback current and delivers an output voltage proportional to the unknown current In this design, the input's dc resistance consists mostly of R 2 and IC 1 ’s effective input resistance, or ...
    22-02-2024
19. Transistors offer thermal protection for controller
    Circuits Supply ON Semiconductor NCP1200
    .. that's higher than ambient by a few tens of degrees. To overcome this problem, you can implement a thermistor-based design, but this solution compromises the system's cost. Fortunately, you can use standard bipolar transistors ...
    21-02-2024
20. Multiple power supplies fortify high-side gate control
    Circuits Supply Microchip MIC4680
    .. a recent design project, a robust power supply was needed to control the gates of high-side FETs. Optocouplers readily ...
    14-02-2024

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