Even switch-mode power supplies with a fixed switching frequency do not always show a continuing pattern of pulses. In some conditions, pulses are omitted for various reasons...
Articles and news - 5
When pulses are omitted in switch-mode power supplies
Micropower CMOS oscillator, draws only 0.5 µA
Conventional astable oscillator circuits that use CMOS logic gates, bipolar transistors or low current op Amps, often require more current than necessary...
A different twist to the power pushbutton problem: A kilowatt AC DAC
Design Idea contributors have recently explored various possibilities for ON/OFF power control using just a momentary contact “shiny modern push-button,” many of which build off of Nick Cornford’s “To press on or hold off? This does both”...
Improve the accuracy of programmable LM317 and LM337-based power sources
Several Design Ideashave employed the subject ICs to implement programmable current sources in an innovative manner. Figure shows the idea...
TDK announces high-performance IMU to accelerate optical image stabilization adoption
TDK Corporation announces availability of the new InvenSense SmartMotion ICM-536xx family of high-performance 6-axis IMUs to select customers, bringing high-performance optical image stabilization...
High-isolation converters use off-the-shelf magnetics
Isolated flyback converters usually evoke thoughts-or bitter memories-of custom transformers, slipped delivery schedules, and agency-approval problems. Off-the-shelf flyback transformers carry isolation ratings of only 300 to 500 V and rarely of as much as 1 kV...
80V/100V asynchronous buck converters from Diodes incorporated deliver high efficiency in automotive 48 V PoL applications
Diodes Incorporated introduces four new automotive-compliant asynchronous buck converters for 48 V low-voltage rail point-of-load applications...
25-kV generator tests insulation
To generate high voltages with proper insulation between the “hot node” and the rest of the circuitry, a car ignition coil can function in place of a high-voltage transformer...
Ultra-low-noise phantom microphone supply uses tiny DC-DC converter plus capacitor "trick"
Professional condenser microphones require a 48-V supply to charge the internal capacitive transducer and power the internal buffer for the high-impedance transducer output. You can use a simple boost converter, a filter circuit to reduce electromagnetic interference...
Simple changes improve Schmitt trigger
The classical Schmitt trigger circuit that you'll find in textbooks provides some noise immunity, such as for the front end of magnetic pickup in position-sensor circuits...