本轮，我们开启硬件岗位的解析，题目来自海康威视的硬件相关岗位的笔试题。今天解析三道问答题： t1~t3区间，D1导通，D2反向截止，Vo=VD； t3~t2区间，D1导通，Vo=VD； t2~t4区间，D1反向截止，D2导通，Vo=VD； t4之后，D2导通，D1截止。Vo=3+VD。 其真值表和Vo波形图 ...

This document tackles the basic facts of the 74HCT TTL Compatible CMOS components. It includes a comparison between its sub-family of components. Suggestions on what CMOS to use on a specific ...

调试时总是会遇到各种各样的接口，各种各样的转换板，似懂非懂的感觉很不爽! 本文引用地址： 首先，串口、UART口、COM口、USB口是指的物理接口形式(硬件)。而TTL、RS-232、RS-485是指的电平标准(电信号)。 串口：串口是一个泛称，UART，TTL，RS232，RS485都遵循类似 ...

在本文中，我们将介绍相反的问题：假设有一个3.3V输出，需要驱动一个5V系统。 这是一个非常典型的情况，我们有一个3.3V系统（例如大多数32位系统，如STM32），我们需要将数据发送到较旧的5V系统，比如51单片机。 对于CMOS输入，输入电流通常在1uA左右或更低 ...

On the path to exploring complex logic, let’s discuss the electrical properties that digital logic signals are comprised of. While there are many types of digital signals, here we are talking about ...

If your introduction to digital electronics came more years ago than you’d care to mention, the chances are you did so with 5V TTL logic. Above 2V but usually pretty close to 5V is a logic 1, below ...

The AD8469 is a fast comparator fabricated on XFCB2, an Analog Devices, Inc., proprietary process. This comparator is exceptionally versatile and easy to use. Features include an input range from VEE ...

A set of four high-speed CMOS 20-bit bus switches provides pin-compatible equivalents to existing transistor-transistor-level (TTL) parts. These switches are designed for use in applications such as ...