Written by｜Bomb Dance Everything started from an occasional thought in 2004 Earlier, I came across an interview with Bruno Putzeys, one of the founders of Mola Mola, in SoundStage! Ultra from 2014, which detailed the Mola Mola DAC that had not yet been officially launched at that time. Bruno mentioned that everything should start from … Read more
This article is about classic Q&A on ADC/DAC design, covering common issues such as clock duty cycle, common mode voltage, gain error, differential phase error, intermodulation distortion, and more. 1. What is Small Signal Bandwidth (SSBW)?Small Signal Bandwidth (SSBW) refers to the frequency at which the output amplitude drops to a specified value compared to … Read more
Any practical electronic application will be affected by multiple sources of error, which can cause even the most precise components to deviate from their specified behavior in the datasheet. When the application signal chain lacks built-in mechanisms to self-correct these errors, the only way to minimize their impact is to measure the errors and systematically … Read more
In the field of digital signal processing, the Nyquist sampling theorem establishes the fundamental criterion for signal digitization— to accurately reconstruct a continuous signal, the sampling frequency must be at least twice the highest frequency of the signal.However, engineers have observed an interesting phenomenon: in practical applications, we often generate signals exceeding 500MHz using a … Read more
The digital-to-analog (DAC) and analog-to-digital (ADC) conversion in microcontrollers is a key technology that connects digital systems with the analog world. 1. Basic Concepts 1. DAC (Digital-to-Analog Converter) Function: Converts digital signals into analog signals (such as voltage or current). Application Scenarios: Driving motors, audio output, LED dimming, etc. Implementation Methods: Weighted resistor networks, R-2R … Read more
ChipBai Microelectronics (Beijing) Co., Ltd. ChipBai Microelectronics (Beijing) Co., Ltd. was established in 2014, adhering to the philosophy that “creating value for customers is the value of our existence,” with the entrepreneurial mission of “specialized development,” “serving with chips,” and “creating a future with chips.” After years of development, it obtained the High-tech Enterprise Certificate … Read more
Yesterday, I wrote about a few yuan original Dao earphones (click to review), which are currently recognized as the highest cost-performance “flat-head earphones” with a 3.5mm interface suitable for old phones, old MP3 players, and other devices. However, the Type-C version is priced at nearly 20 yuan, which diminishes its cost-performance ratio.Some people asked if … Read more
Hello everyone, I am Xiao Chen. Today, let’s discuss a practical topic: how can microcontrollers output audio signals? Currently, there are two mainstream solutions: directly using a DAC (Digital-to-Analog Converter) or using PWM (Pulse Width Modulation) for analog output. Both methods have their pros and cons, and many beginners can easily get confused. Today, I … Read more
In the open-source oscilloscope differential measurement probe – PD150, there is an MCU with DAC functionality that can provide bias voltage compensation for operational amplifiers.Recently, I have been working on this product It looks very nice but it is a PIC (ATSAMD10D14A), which is not well-suited for domestic use (it’s my fault for not knowing … Read more
Synthesizers and Clock Chips LMX2624 – SP: A space-grade broadband synthesizer with phase synchronization capability, supporting JESD204B, operating from 5MHz to 28GHz. LMX1860 – SEP: A radiation-hardened 15GHz RF buffer, frequency multiplier, and divider with SYSREF (supporting JESD204B/C) and FPGA clock. LMX1205: A low-noise, high-frequency buffer/frequency multiplier/divider with JESD204 support and programmable clock delay. Analog-to-Digital … Read more