Articles and news - 10

Simple switchable filter
Simple switchable filter
07.14.2022 Circuits

Figure shows how a Sallen-Key high pass filter, can be switched on/off using only one extra transistor and resistor...

Circuit Combines DC High-Voltage Drop Detector
Circuit Combines DC High-Voltage Drop Detector, Undervoltage Alarm
07.13.2022 Circuits

Environmental systems that precipitate dust and carbon particles frequently use high-voltage dc power supplies. However, failure of high-voltage components caused by a change in their properties over time can create a large drop in voltage that prevents the system from working properly...

China PCB Prototype and Fabrication Manufacturer
STMicroelectronics releases next-generation Bluetooth system-on-chip enhanced
STMicroelectronics releases next-generation Bluetooth system-on-chip, enhanced with latest positioning capabilities
07.13.2022 News

STMicroelectronics has introduced its third-generation Bluetooth® System-on-Chip (SoC), enhanced with Bluetooth direction finding technology for location-tracking and real-time positioning applications...

Shunt regulator eases power-supply-start-up woes
Shunt regulator eases power-supply-start-up woes
07.12.2022 Articles

The popular and multiply sourced TL431 three-terminal shunt regulator offers designers considerable versatility in its applications...

Low-voltage interface circuits translate 1.8 5V
Low-voltage interface circuits translate 1.8 to 5V
07.07.2022 Circuits

Interfacing two systems that operate at two arbitrary voltages is a challenging problem; there is no guarantee that one side operates at a voltage higher than the other side. Usually, the interface is an open-collector or open-drain type with just two transistors connecting back to back...

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...