Articles and news - 6

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

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...

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...

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

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...

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...

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...

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...

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...

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