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Search results: 152   Output: 1-10
  1. Kannan N Electronic Design Many products require an auxiliary dc output to power external devices or subsystems. If such subsystems are to be hot-connected, the auxiliary output must be protected against short circuits. Schemes using fuses are slow ...
  2. Robert H. Russell Electronic Design I needed a simple LED indicator showing that a particular voltage level had been reached specifically, that a capacitor had charged to a particular potential. I was convinced that there must be a way that a ...
  3. Jayashree Raghuraman EDN The novel logarithmic amplifier in Figure 1 relies on the exponential charging characteristics of a simple RC circuit. The expression for the time, T, required for a capacitor, C, to reach a voltage (V IN V K ) from 0 V, ...
  4. Michele Costantino EDN This Design Idea describes a simple and effective way to provide optoisolation for devices connected on the I 2 C bus (Figure 1). It improves on an earlier version (Reference 1). SDA and SCL are on the bus master’s side ...
    Circuits » Analogue Design · Interfaces » ON Semiconductor » FDV302P, HCPL0600
  5. Alex Birkett EDN Traditional current sources and voltage-to-current converters based on instrumentation and operational amplifiers offer high output impedances at low frequencies because of the amplifiers' good low-frequency CMRR ...
    Circuits » Analogue Design » Analog Devices » AD8066, AD8065, AD8129, AD8130
  6. Jim Tonne Electronic Design With a handful of low-leakage passive components and two high-impedance op amps, you can build a sine/square-wave generator with output period of a minute and more. The circuit of Figure 1 generates sinusoids down to ...
  7. by John Ardizzoni, Analog Devices Eelctronic Design Europe In consumer electronics applications, which tend to be lower in frequency and less demanding than typical clock-buffering applications, inexpensive high-speed op amps (~100-MHz bandwidth) ...
    Circuits » Analogue Design » Analog Devices » AD8057, AD8061
  8. Tom Bruhns EDN The novelty circuit in Figure 1 illustrates the extremely low gate-leakage current typical of modern power MOSFETs. You can find parts that, in a moderately dry environment, will hold their state for days at a time. In operation, if ...
    Circuits » Analogue Design » Vishay » IRF530, SI4490DY
  9. Sundaresan Sundararaj Electronic Design This idea describes a white-LED (WLED) driver circuit controlled by a simple ambient light sensor (ALS). A typical application would be a brightness control for cell-phone backlighting. On a very sunny day, ...
  10. Jean-Bernard Guiot EDN Controlling a small dc motor without speed control sounds like a trivial task; a switch or a relay should suffice. However, several problems accompany this approach. For one, the switch, because of the inductive load and the ...
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