Circuits & Schematics: Design - 4

31. Adding one resistor improves anemometer analog linearity to better than ±0.5%
    Circuits Analogue Design Measurement Texas Instruments LM10 LMC555 2N5089
    .. back I published a simple design idea for a thermal airspeed sensor based on a self-heated Darlington transistor pair ( Ref. 1 ). See Figure ...
    29-12-2023

32. Linear and switcher LED supplies combine, overcome disadvantages of each topology
    Circuits Supply onsemi CAT4101 CAT4201
    .. 3 V, the linear driver takes over. Note that if the other half of the LM393 is not used for another LED power supply, good design practice dictates that all unused input and output pins on the LM393 be tied to ground. Figure 2 shows the ...
    28-12-2023

33. RFL-class logic gates
    Circuits Digital Microchip 2N7000
    .. Design Idea describes a new class of logic gates, which we have named resistor-FET-logic, aka “RFL.” How ...
    25-12-2023
34. New full-wave precision rectifier has versatile current mode outputs
    Circuits Analogue Design Signal Processing, Filters Texas Instruments TLV2371
    .. dubious) advantages compared to competing topologies. This “new” (I haven’t seen it elsewhere) idea for a design shown in Figure 1 joins the mob with the following claims to fame. It requires only a single amplifier, runs ...
    22-12-2023
35. Multivibrator also makes true-zero output of the op-amp
    Circuits Signal Processing, Filters Supply STMicroelectronics BAR43A
    .. zero output of an op-amp that is based on a symmetrical multivibrator for better efficiency than the previous photocell design idea. This second circuit is based on a symmetrical multivibrator and has far better efficiency than its ...
    19-12-2023
36. Single supply function generator outputs buffered squares, triangles, and sines
    Circuits Oscillators Texas Instruments TLV9064
    .. of square, triangle, and sine waveform outputs is a familiar tool on electronics lab benches. It’s also a classical design exercise. Generally, the square and triangle are easy, so the problem is how to generate an acceptably ...
    13-12-2023
37. Force/sense connection eliminates multiplexer on-resistance error
    Circuits Amplifiers Analog Devices LT1028
    .. controlled gain is an everyday analog-design element. You frequently find this element in an op-amp-based, transimpedance current-to-voltage converter. ...
    08-12-2023
38. Circuit transmits ARINC 429 data
    Circuits Interfaces Texas Instruments CD74HC08 CD74HC390 CD74HC40105 CD74HC4052
    .. in 5 V microcontroller-based designs. The circuit in Figure 1 serves the Tx (transmit/output) portion of the 429 spec. The design implements a high-speed ARINC-429-compliant transmit function using a single 5 V supply rail and 74HC series ...
    04-12-2023
39. HV flyback converter improves efficiency
    Circuits Supply Texas Instruments LM311 LM555 VFC32BM CD4011A
    .. Design Idea significantly improves conversion efficiency of externally driven flyback converter-based capacitor ...
    01-12-2023
40. UVP protects rechargeable batteries
    Circuits Supply Diodes TL431
    .. rechargeable battery types can be damaged by deep discharge. This Design Idea circuit performs under-voltage protection (UVP) to prevent this, as well as acting as a load switch ...
    30-11-2023

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