传输数字信号和权力相同电线-Transmit Digital
abstract: analog switches can be used to enable the transmission of digital signals and power over the same two wires. the signal waveform is rectified at the remote location to provide a stable supply voltage and modest load current (about 1ma maximum) for the receiver.
this signaling system enables the transmission of digital signals and power over the same two wires (figure 1). the signal waveform is rectified at the remote location to provide a stable supply voltage and modest load current (about 1ma maximum) for the receiver.
figure 1. this digital signaling system accepts single-ended data, transmits differential data, and produces a supply voltage for the receiver by full-wave rectifying the remote-end signal.
for conventional single-ended data, a series of 0s can allow excessive droop in the receiver's supply voltage. to avoid that problem differential data (±5v to ±18v) is transmitted, pseudo rs-485 style, from a single-ended logic-level input. the full-wave rectifier and differential drive ensures that a supply voltage is always present
current-limiting resistors at the supply inputs prevent damage in the event of a line short. values of 1kω are optimum. higher values produce excessive switching noise at the chip side of the resistors, caused by charge injection from the switches. adequate decoupling of the supply rails also helps to minimize noise.
with +5v and -5v supplies powering the max4526/4527 as shown in figure 1, the measured output for various loads is as follows:
load (ω) vsupply(v)
1m 9.60
47k 9.00
10k 8.60
8.2k 8.40
5k 8.20
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this signaling system enables the transmission of digital signals and power over the same two wires (figure 1). the signal waveform is rectified at the remote location to provide a stable supply voltage and modest load current (about 1ma maximum) for the receiver.
figure 1. this digital signaling system accepts single-ended data, transmits differential data, and produces a supply voltage for the receiver by full-wave rectifying the remote-end signal.
for conventional single-ended data, a series of 0s can allow excessive droop in the receiver's supply voltage. to avoid that problem differential data (±5v to ±18v) is transmitted, pseudo rs-485 style, from a single-ended logic-level input. the full-wave rectifier and differential drive ensures that a supply voltage is always present
current-limiting resistors at the supply inputs prevent damage in the event of a line short. values of 1kω are optimum. higher values produce excessive switching noise at the chip side of the resistors, caused by charge injection from the switches. adequate decoupling of the supply rails also helps to minimize noise.
with +5v and -5v supplies powering the max4526/4527 as shown in figure 1, the measured output for various loads is as follows:
load (ω) vsupply(v)
1m 9.60
47k 9.00
10k 8.60
8.2k 8.40
5k 8.20
高通获向华为出售4G手机芯片的资格认证
Kyndryl(勤达睿)已从 IBM 完全剥离，在纽交所独立上市
高性能的模拟技术将加速智慧医学影像的发展
“新能源+储能”发展的四个重要点
小型超声波清洗机电路图
传输数字信号和权力相同电线-Transmit Digital
广西桂林fm频道列表
Orbital 淋浴系统采用PCR雷达传感器实现节水节能
关于捷变频雷达频踪测试方法的介绍和分享
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即插即用的USB网络收音机
该如何应对5G所带来的4大网络安全挑战
当5G全面商用，将会给智能家居带来什么样的变化？
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