可能有很多读者都还不知道 TTL、RS232、485 到底是什么，本节简单概述一下它们是什么。 TTL：Transistor Transistor Logic，晶体管-晶体管逻辑电平。 比如：0V代表逻辑低电平，5V代表逻辑高电平。像STM32单片机串口引脚输出的逻辑高电平就是3.3V。 你可能会问：什么是 ...

可能有很多读者都还不知道 TTL、RS232、485 到底是什么，本节简单概述一下它们是什么。 1.TTL电平 TTL：Transistor Transistor Logic，晶体管-晶体管逻辑电平。 比如：0V代表逻辑低电平，5V代表逻辑高电平。像STM32单片机串口引脚输出的逻辑高电平就是3.3V。 你可能会问 ...

A variety of logic-circuit techniques have been in use since the 1960s, when integrated logic first came into existence. In the beginning was Resistor-Transistor Logic (RTL). Then came ...

目前应用最广泛的数字电路是TTL电路和CMOS电路。 TTL电路以双极型晶体管（三极管）为开关元件，所以又称双极型集成电路。双极型数字集成电路是利用电子和空穴两种不同极性的载流子进行电传导的器件。 它具有速度高（开关速度快）、驱动能力强等优点，但 ...

Logic signals have fallen from the 15V of the old CMOS 4000 series to 5V TTL (transistor-to-transistor logic) to modern CMOS levels of 3.3, 2.7, and 1.8V. Advanced processes use digital logic that ...

This may very well be the smallest homemade TTL CPU we’ve ever seen. Measuring at one square inch, this tiny chip boasts 40 connections, an 8-bit databus, a 16-bit address bus, a 64 kB memory space, ...

The panel industry is rapidly accelerating to higher resolution and a greater number of bits per colour. Breakthroughs in resolution and color are possible only when increasing the overall data rate ...

The fun part about logic gates is that there are so many ways to make them, with each approach having its own advantages and disadvantages. Although these days transistor-transistor logic (TTL) is the ...