Circuits & Schematics - 3

Why not take advantage of the micro-controller included in many systems these days? This design uses microcontroller feedback to produce a 50-V, 1-W power supply (see Figure 1). It leverages an unused analog-to-digital converter (ADC) input and a ...

Inspired by the excellent idea shown in the article “Class AB 20-W current booster is insensitive to temperature variations” by Jordan Dimitrov ( Ref. 1 ), this variation of the design shown in Figure 1 enables an amplifier that can ...

The circuit in Figure 1 provides a simple and inexpensive way to protect one of the most valuable components in portable applications: the battery. Applications include all portable equipment that requires a limited time of operation, such as test ...

A previous Design Idea describes a simple way to automatically turn off a battery after a preset on period to save battery life ( Reference 1 ). This Design Idea presents a simpler way to perform the same function (Figure 1). Two gates of IC 1 , a ...

The classic implementation of a voltage-halving circuit uses two equal-value resistors. Using 1% resistors provides a divider output with 2% accuracy. For most applications, this performance is cost-effective and more than adequate. However, when ...

Sawtooth- or exponential-ramp relaxation oscillators are common and generally easy to build. However sometimes a cleaner waveform is desired, and generators of even-symmetric waveforms are a bit more difficult to design. Triangle wave generators ...

TinyLoad is a simple electronic constant current dummy load. The ATtiny measures voltage, current and temperature of the heat sink, calculates power, energy and battery capacity, controls the fan and displays all relevant data on the OLED (Figure ...

Class AB amplifiers have been the workhorses of the audio world, thanks to their simplicity, and their ability to deliver high power levels with low distortion. But there are also a number of gremlins that lurk within the AB architecture, mostly in ...

The circuit in Figure 1 is based on a classic GIC (generalized impedance converter). The sine-wave-oscillator circuit has inherent amplitude stabilization and normally operates from dual power supplies. However, if you connect an additional ...

Applications ranging from frequency counting and synthesis to sensor signal conditioning require conversion of RF signals to digital-logic levels. In such situations, designers typically use a high-speed voltage comparator to perform the ...