Cellular phones have traditionally used superheterodyne receivers and transmitters. However, as demand for multimode terminals that include multiple standards (GSM, cdma2000, and W-CDMA) has grown, di...
I soldered a circuit according to the circuit diagram of ad9834 datasheet, but after writing the program, it produces a wave, but the difference is too big. The program is fine....
Testing of the company's products.
Vin is the input voltage, which is required to be between 1.8 and 2.4V. I designed a circuit
If it is not within the range, call the police. This is my first time wr...
I want to use the API program to obtain the network type that the current mobile phone is connected to, such as GPRS, edwg, 3G, CDMA, etc.? ? Thank you...
Above is my FPGA reset schematic.
POR connected to FPGA
DSP_POR is connected to the DM6467 processor
PHY_RESET_N is connected to the network chip
We disconnected the R12 resistor.
I started the develo...
The problem of dynamic sealing of equipment always exists with the operation of the equipment. Today, we have specially sorted out the various commonly used sealing forms, usage scope and character...[Details]
In recent years, with the application of the IEC61850 standard and the development and deployment of optoelectronic transformers, the concept of digital substations has been put into practical use ...[Details]
In June 2014, the Ministry of Industry and Information Technology issued 4G FD-LTE licenses to China Unicom and China Telecom. Together with the 4G TD-LTE licenses issued to China Mobile, China Uni...[Details]
Based on the commutation technology, thyristor rectifiers are classified into two main types. Line-commutated and force-commutated inverters are commonly used, while other commutated inverters, nam...[Details]
Through AI connection technology supported by Qualcomm X85 5G modem and RF and Qualcomm FastConnect 7900 mobile connection system, seamless switching can be achieved between cellular net...[Details]
Civilian internal combustion engines operate in the range of approximately 1000-4000 rpm. This results in the engine's kinetic energy being ineffective at low or high rpm, making starting difficult...[Details]
Analog Devices held a third-quarter fiscal 2025 earnings conference call. Vincent T. Roche, CEO and Chairman of the Board, and Richard C. Puccio, Executive Vice President and Chief Financial Office...[Details]
I believe everyone has heard of memory. If your computer is slow, your experts may recommend upgrading it to a larger capacity. But what exactly is computer memory used for? Why does memory capacit...[Details]
Pure electric vehicles have experienced rapid growth in recent years, and many consumers now consider them as a top choice when purchasing a car. But do you know how to choose a satisfactory and sa...[Details]
Generally not, but there are exceptions. For example, a torque motor controller with three-phase output voltage imbalance can cause current imbalance, similar to a phase loss. However, only two pha...[Details]
Perhaps due to the stereotypes surrounding electronic products, many owners of pure electric vehicles have questions about charging. What's the correct way to charge? How can charging slow down bat...[Details]
1. Output power. Rated power (RMS): Rated power refers to the sinusoidal alternating power that the amplifier can withstand for a long time. Maximum undistorted power...
2. Frequency response:...[Details]
What is the difference in response time when the output uses cyclic refresh and direct refresh?
The time required from when the PLC receives an input signal to when the PLC outputs a con...[Details]
Momenta's self-developed assisted driving chip has been successfully launched and entered the actual vehicle testing phase. This is the first time that Momenta has "settled" its own algorithm on an...[Details]
With the global penetration rate of new energy vehicles projected to exceed 45% by 2025, and the industry's transformation entering its second half, the era of intelligentization, LiDAR has rapidly...[Details]
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