Two-transistor circuit replaces IC
Two-transistor circuit replaces IC
07.05.2022 Circuits

Linear Technology's recently introduced LTC4300 chip buffers I2C clock and data lines to and from a hot-swappable card. This task is difficult because the IC must work bidirectionally, meaning that you can simultaneously and actively drive both sides...

Bipolar transistor boosts switcher current by
Bipolar transistor boosts switcher's current by 12 times
06.30.2022 Circuits

The circuit uses a minimal number of external parts to raise the maximum output current of a 0.5 A buck switching-regulator IC to more than 6 A. The circuit accommodates input voltages of 15 to 60 V and delivers output voltages of 3.3, 5, or 12 V...

Pulse generator precision output-duty cycle operates
Pulse generator with precision output-duty cycle operates at a repetition rate beyond 50 MHz
06.30.2022 Circuits

A previous Design Idea describes an astable multivibrator that gets hysteresis from the positive feedback stage using a technique you can characterize as positive-capacitive feedback. It creates hysteresis by a charge transfer to its main timing-capacitor...

Supply Bootstrapping Reduces Distortion Op-Amp Circuits
Supply Bootstrapping Reduces Distortion In Op-Amp Circuits
06.29.2022 Circuits

New operational amplifiers optimized for high-performance audio and ultrasound applications combine extremely low total harmonic distortion plus noise (THD+N), –130 dB, with large output voltages on heavy, 600-Ω loads. One would think this might be the universal building block. In real life, it’s a bit more complex...

Astable multivibrator gets hysteresis positive-feedback stage
Astable multivibrator gets hysteresis from positive-feedback stage
06.28.2022 Circuits

Many designs exist for logic-based astable multivibrators, one of the simplest being an RC feedback loop around a single inverting Schmitt trigger inverter...

Shunt regulator provides overvoltage protection
Shunt regulator provides overvoltage protection
06.27.2022 Circuits

The circuit uses a typical technique for varying the output voltage of a power supply via a programmable control voltage. Although the topology and schematic details of the power supply are not critical, the protection technique is novel...

Generate pulse width that is inversely
Generate a pulse width that is inversely proportional to the square root of an analog voltage
06.23.2022 Circuits

The circuit is an edge-triggered monostable circuit, based on a previous design of an edge-triggered parabolic-pulse generator...

Positive edges trigger parabolic timebase generator
Positive edges trigger parabolic timebase generator
06.23.2022 Circuits

Nonlinear systems often need to become linear to be useful, and the circuit provides a nonlinear sawtooth pulse for a PWM (pulse-width modulator) that can compensate for nonlinearities in sensors, controllers, or systems...

Memory-termination IC balances charges on series
Memory-termination IC balances charges on series capacitors
06.22.2022 Circuits

As one of today's most interesting component families, high-value capacitors offer ratings ranging from tenths to tens of farads but suffer from relatively low working voltages...

Transconductance amp gives oscillator reciprocal response
Transconductance amp gives oscillator reciprocal response
06.21.2022 Circuits

The circuit is a variation on the familiar integrator/comparator triangle-wave oscillator, which you typically implement with two op amps. An integrator and a comparator connect in a positive-feedback loop; the comparator drives the integrator and vice versa...