Practical Design of Bluetooth Noise Canceling Headphones (2)

Chapter 2 Circuit Design After finishing the project approval in the previous chapter, this chapter will enter the circuit design. There are several basic tasks to be done in the circuit design: Collect the specifications of all newly used electronic components, and carefully understand whether the important parameters of the components meet the design requirements. […]

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What is the effect of baseband I/Q tracking mismatch?

Baseband I/Q trace mismatch degrades sideband rejection of RF I/Q modulation Trace mismatches between the DAC and the RF modulator, including the I and Q paths, the differential lines IP and IN, and the differential lines QP and QN, can cause I/Q amplitude and phase errors and lead to sideband suppression (SBS) degradation . RF […]

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Practical Design of Bluetooth Noise Canceling Headphones (4)

Chapter 4 Function Debugging Functional debugging is the key to verifying whether the design is qualified, and it is also the stage where engineers spend the most time, and this process may need to be repeated many times. This chapter focuses on the debugging process. The first job after the PCB board is back is […]

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How to Build a NodeMCU Motor Driver Expansion Board

When developing a robotics project, motors are one of the most important parts of the overall project, and more than one motor is always required. But the GPIO pins of the microcontroller board don’t allow you to draw the amount of current the motor needs. This is why motor driver ICs are used. You can […]

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Discussion on the Forming Method of Antenna and Estimation Value of Impedance

This application note details the various antennas used in today’s handheld transmitter applications, such as remote keyless entry (RKE) systems, tire pressure monitors (TPM), garage door openers, home security sensors and even TV remotes. This application note discusses loop/whip, raised strip/”paperclip”, conventional whip, helical, and patch antennas, and proposes networks to match them to Maxim […]

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How to achieve Wi-Fi design freedom with a fully integrated module

Embedded system designers face many challenges in selecting the appropriate components to meet functional, budgetary and regulatory requirements, especially when wireless technologies are involved. Until recently, adding Wi-Fi meant learning and implementing complex software subsystems just to provide the deceptively simple wireless networking. Typically, this requires digging into an embedded operating system (such as Linux), […]

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Design of Smart Thermostat Based on Wireless Connection of RL78 Microcontroller

This white paper introduces the RL78 microcontroller family along with the GainSpan Wi-Fi module as a way to design smart thermostats that provide wireless connectivity. It briefly describes the wireless network, the functions of the Smart Wi-Fi Thermostat, and the reference solutions provided by Renesas. Dozens of useful embedded system products surround us every day. […]

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Step-by-Step Method for MRF24J40 RF Transceiver Setup

This application note describes the MRF24J40 radio utility driver, including its functionality and firmware. This document also provides a step-by-step method for setting up the MRF24J40 RF transceiver. introduce The MRF24J40 Radio Utility Driver provides design engineers with a development and test platform for the MRF24J40 IEEE 802.15.4™ 2.4 GHz RF Transceiver. The program uses […]

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How to Build a DIY Amplifier

1. What is a Class D amplifier? What is a Class D audio power amplifier? In an easy-to-understand language: A Class D audio power amplifier is a switching amplifier. But if you want to fully understand how a Class D audio power amplifier works, a deeper understanding is required. Conventional amplifiers, eg class AB, operate […]

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MAX1472 Transmitter and MAX1473 Receiver Reference Design for Remote Keyless Entry (RKE) Applications

This reference design provides a complete demonstration platform for using industrial/scientific/medical (ISM) radio frequency (RF) products in remote keyless entry (RKE) applications. It discusses package size, data rates, transmit and receive frequencies, component value calculations and selection, layout considerations, and firmware operation. Development steps, system structure, sample code and test results are also provided. This […]

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