Precision synchronous detection amplifier facilitates low voltage measurements

This design idea presents a practical circuit that implements synchronous detection to amplify small DC voltages with high linearity and excellent noise immunity. Such circuits are required in measurements involving current shunts, load cells, thermocouples, etc. Synchronous detection is explained in many books, papers and instrument manuals. If you are not familiar with the topic, … Read more

Dual N-channel JFET lowers noise in precision instrumentation and sensors

The LS844 monolithic dual N-channel JFET from Linear Systems provides low input capacitance, substantially reducing intermodulation distortion. Targeting precision instrumentation and sensor applications, the LS844 offers a combination of high transconductance, low noise of 2.5 nV/√Hz typical at 1 kHz, and low input capacitance of just 3 pF typical and 8 pF maximum. Constructed by … Read more

Current sensing considerations in a bridgeless totem pole PFC

Two of the top considerations in data center and server power-supply unit (PSU) designs are power density and efficiency. Meeting the strictest efficiency standard—80 Plus Titanium—is now a minimum requirement for next-generation data center and server PSUs. The 80 Plus Titanium requires over 96% end-to-end peak efficiency, which means that the power factor correction (PFC) … Read more

VIDEO: Engineer It – How to Measure ACPR for Wideband Communication

In the following video, learn how to use data analysis software to measure the adjacent channel power ratio (ACPR) in a wideband communications system. In the following video, learn how to use data analysis software to measure the adjacent channel power ratio (ACPR) in a wideband communications system. We’ll look at the main WCDMA signal, … Read more

How to Use RIGOL PA1011

This application note helps users to know and understand the basic functions of RIGOL’s PA1011 Power Amplifier. It presents a basic definition and highlights the most important features of the device. Furthermore, this document serves as a How-to-Guide for the control of the amplifier using the DG1022 Digital Oscilloscope. Introduction  This application note helps users … Read more

Using Analog Components to Manage Power in Low-Power Solar Systems

From large panels to harvested microwatts from a few photodiodes, solar power is increasingly prevalent in autonomously powered systems. With the worldwide evolution toward lower power operation using more “green” energy sources, emphasis on deploying solar power in a greater variety of environments has been on the rise. Martin Tomasz – Touchstone Semiconductor, Inc. From … Read more

Product Overview of the IR4312M from International Rectifier

The IR4312M Audio Amplifier from International Rectifier is a Class D amplifier that integrates the power MOSFETs with the audio controller IC into a single package, which reduces parasitics and improves sound quality. The IR4312M Audio Amplifier from International Rectifier is a Class D amplifier that integrates the power MOSFETs with the audio controller IC … Read more