1. Basic Working Principle of Optical Fiber Sensors The national standard GB 7665-1987 defines a sensor (Transducer/Sensor) as a device or apparatus that can sense a specified measurement and convert it into a usable output signal according to certain rules. The basic working principle of an Optical Fiber Sensor (OFS) is illustrated in the figure … Read more
Books written by foreigners are usually lively and easy to understand, but unfortunately, most translations are quite stiff. Today, I recommend this introductory book on RF, authored by Carl and J. Weisman. Based on the author’s years of work experience, it uses a humorous and engaging language, with concise and clear sections, focusing on the … Read more
Problem Statement Dear Zhu, I recently encountered a problem that I would like to consult you about. We are using the OPA2350 for our electromagnetic operational amplifier, and instead of copying a board, I designed a circuit myself. The waveform simulated in Multisim is correct, and the rectified waveform is also correct; when I tested … Read more
Since we are starting from an example, we need to determine the overall scheme and relevant specifications. Based on this, we must design each module according to the workflow and determine the matching connection methods between them. This example begins processing from the intermediate frequency (IF) signal sampling. Following the mature scheme of the receiver, … Read more
Minimum Shift Keying (MSK) is a special type of Continuous Phase Frequency Shift Keying (CPFSK) modulation method. It has advantages such as constant signal envelope, continuous phase, high bandwidth efficiency, and good power spectral characteristics, making it widely used in mobile communications, satellite communications, and other scenarios where signal quality and bandwidth resources are strictly … Read more
Four-level Frequency Shift Keying (4FSK) is an important branch of digital modulation technology, representing four-level symbols (each symbol carries 2 bits of binary information) through four different frequency carrier signals. It is widely used in fields such as wireless communication and industrial control. Its core advantages lie in strong anti-interference capability and low implementation complexity, … Read more
Korg has announced the release of Multi/Poly Native, the software version of the Multi/Poly synthesizer. Users can seamlessly exchange sounds between hardware and software, accessing an ever-growing library of excellent third-party sounds while keeping their sounds and software updated. You can create with Multi/Poly Native in your DAW and then perform the same sounds on … Read more