Abstract: A two-stage first-order adjustable phase shifter with a center frequency of 100 MHz is constructed using a PIN tube and a radio frequency operational amplifier. The phase adjustment range is...
I used Protel99 for the first drawing, then 99SE, and now I use Altium Dexigner 6.8. But when I draw the schematic and load the schematic bus network connection into the PCB, why can't I connect it of...
I would like to ask how the file storage path is determined in embedded systems. Take Spreadtrum platform as an example. What is the storage process? How is it implemented in the driver?...
The 2011 National College Student Competition test paper has been announced. If contestants have any questions about Question H of the competition, they can post them here !We look forward to the enth...
The following code is the input capture function of GD32F303CBT6 that I wrote according to the information on the Internet. It uses PA0 and TIME4_CH0. The PA0 pin has input a 50% signal of 1KHZ.
#incl...
With the promotion of the construction of intelligent communities in the country, anti-theft systems have become essential equipment for intelligent communities. Especially in recent years, the urg...[Details]
This program is written to simulate the serial port hardware mechanism. When used, a timed interrupt can be set with a time interval of 1/4 baud rate. The receiving function is called once for ea...[Details]
DSP (digital signal processor) is used more and more frequently in today's engineering applications. There are three main reasons for this: first, it has powerful computing power and is capable of ...[Details]
Aromatic gases are widely present in food, medicine, cosmetics and various daily chemical products, such as snacks, liquor, spices, Chinese herbal medicines, plasters, perfumes, soaps, shampoos, et...[Details]
On the afternoon of July 10, Beijing time, Taiwan's largest chip designer MediaTek expects its smartphone chip shipments to grow by double digits in the third quarter of this year, and the company is ...[Details]
Investment in
the
medical device
industry has been on the rise in recent years. In the past two years, venture capital for medical devices has almost doubled, reaching $4 billion in 2007. Fr...[Details]
We know that the inverter consists of two parts: the main circuit and the control circuit. Due to the nonlinearity of the main circuit (switching action), the inverter itself is a source of harmoni...[Details]
Abstract: Aiming at the needs of coal-rock acoustic emission signal monitoring system, a data acquisition circuit with 24-bit resolution and 16-channel synchronous data acquisition function is desi...[Details]
Recently, news came from the certification department that the photovoltaic grid-connected inverter of Samil New Energy Co., Ltd. (hereinafter referred to as "Samil New Energy") has once again obta...[Details]
Currently, each country is developing its own USB interface
charging specifications
, which leads to a major problem that a USB interface
charging
device manufactured in one country...[Details]
Temperature compensated quartz crystal oscillator (TCXO) is widely used as a high-precision frequency source in communication systems, radar navigation systems, precision measurement and control sy...[Details]
The production process of lithium batteries does not mention the previous processes such as material preparation, winding, liquid injection, and packaging, but only talks about the final formation ...[Details]
Measurement compatibility
It is very important to ensure the compatibility between the pressure sensor and its actual application. Before making a pressure sensor selection, the fo...[Details]
1 Introduction to the overall system solution
The hardware part is mainly used to amplify the sound. When the sound is loud enough, the signal can be introduced into the microcontroller for de...[Details]
Introduction
my country's rapid economic growth is mainly due to the development of manufacturing and the acceleration of urbanization. However, urbanization cannot be achieved at the expense ...[Details]
FPGA/CPLD
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