使用内部具有4个放大器的LT1885设计滤波器,采用±5V电源供电,滤波器形式为每个放大器构成一个二阶低通滤波器,其中有一个滤波器输出异常。芯片内部的编号D的放大器,也就是12、13、14脚组成
2023-11-15 06:12
= 0x86e1885b, crc2 = 0x86e1885b, this->state.crc= 0x86e1885b, state_copy->crc= 0x86e
2023-02-20 09:02
怎么确定0630封装的电容有哪些电容值?
2016-06-01 19:41
。其中中国的FDD方式:1920~1980 MHz、2110~2170 MHz共120 MHz;TDD方式:1885~1920 MHz、2010~2025 MHz共50 MHz。
2019-08-23 06:07
: ubi_io_read: error -74 (ECC error) while reading 64 bytes from PEB 1885:0, read only 64 bytes
2018-06-21 07:09
亲爱的艾莉最近得到了MPLAB XPress评估板。我正在寻找一个代码示例来读取模拟引脚上的电压。有什么帮助吗?许多感激的安东尼奥 以上来自于百度翻译 以下为原文 Dear all I have recently got the MPLAB Xpress Evaluation Board. I am looking for an example of code to read voltage on a analogue pin. Please any helps ?Many thanksCordially Antonio
2019-04-28 07:38
本人发现在D1 tina linux在启动 boot阶段和kernel段,打印串口默认都是用uart0,TX :PB08 RX:PB09,而且在要修改boot阶段的串口输出在目录device\config\chips\d1\configs\nezha\sys_config.fex.中修改参数:uart_debug_port = 0uart_debug_tx= port:PB08uart_debug_rx= port:PB09即可。但是如何修改console的串口配置?比如console现在默认是用uart0 PB08 PB09,我如何改为用uart2的PC0 PC1?
2021-12-28 07:25
如何优化LNA的指标?MAX2640低噪声放大器用于ISDB-T设计,有什么优势?
2021-04-20 07:13
嗨, 我们正在使用ST95 HF NFC收发器和XRCGB27M120F3M00R0 27.12 MHz晶振。到目前为止,我们制造了大约30个模块,并且一切运行良好。但是,我们计划在不久的将来(10k +)更大的系列,所以我们希望确保一切都能在整个操作范围内正常工作。目前,我们对晶体规格有疑虑。 在数据表(第59页)中指出,当ESR等于30欧姆的晶体时,额定负载电容应为6pF,并且使用的负载电容应为10至20 pF范围。 如果晶体ESR大5倍(150欧姆),这是否意味着额定负载电容也应该更大(以及多少)以保持与嵌入式振荡器的兼容性? 我们使用的是提到的150欧姆ESR和6pF负载电容的晶体。我们期望大约5 pF的杂散电容(包括引脚和PCB杂散电容),因此我们使用6.8pF负载电容。这也可能是一个问题,因为它们的范围不是10到20 pF吗? 如果数据表指定了振荡器跨导,那也可能有用......以上来自于谷歌翻译以下为原文 Hi, we are using ST95 HF NFC transceiver with XRCGB27M120F3M00R0 27.12 MHz crystal. So far, we manuufactured about 30 modules and all works well. However, we are planning a bit larger series in a close future (10k+) so we would like to be sure everything will work fine in whole operating range. Currently, we have concerns regarding a crystal specification. In datasheet (p 59) it is stated that with a crystal of ESR equal to 30 ohms, rated load capacitance should be 6pF, and also that used load capacitors should be in 10 to 20 pF range. If a crystal ESR is 5 times larger (150 ohms), does that mean that rated load capacitance should also be larger (and how much) in order to keep compatibility with embedded oscillator? We are using mentioned crystal that has 150 ohms ESR and load capacitance of 6pF. We are expecting about 5 pF of stray capacitance (including pin and PCB stray capacitance), so we are using 6.8pF load capacitors. Could this also be a problem, since they are not in 10 to 20 pF range? If datasheet had specified oscillator transconductance, that could be also helpful...
2019-07-17 06:13
:BL2:引导 BL31 U-Boot 2020.04+g7cc85e1885(2022 年 3 月 21 日 - 08:09:34 +0000) CPU:恩智浦 S32G274A 修订版。2.1.0
2023-05-30 14:04