Figure 7. Standard PECL Output Configuration Figure 8. Single Resistor Termination Scheme
Resistor values are typically 140 ohms for
3.3V operation.
Resistor values are typically 84 ohms for 2.5V
operation.
The VCC6 incorporates a standard PECL output scheme, which are un-terminated emitters as shown in Figure 7. There are numerous application notes on
terminating and interfacing PECL logic and the two most common methods are a single resistor to ground, Figure 8, and a pull-up/pull-down scheme as
shown in Figure 9. An AC coupling capacitor is optional, depending on the application and the input logic requirements of the next stage.
LVDS Application Diagrams
V
CC
LVDS
Driver
100
LVDS
Receiver
LVDS
Driver
100
Receiver
OUT+
OUT-
Figure 10 Standard LVDS
Output Configuration
Figure 11. LVDS to LVDS Connection, Internal 100ohm
Figure 12. LVDS to LVDS Connection
Some LVDS structures have an internal 100 ohm resistor on the
External 100ohm and AC blocking caps
input and do not need additional components.
Some input structures may not have an internal 100 ohm
resistor on the input and will need an external 100ohm
resistor for impedance matching. Also, the input may have
an internal DC bias which may not be compatible with
LVDS levels, AC blocking capacitors can be used.
One of the most important considerations is terminating the Output and Complementary Outputs equally. An unused output should not be left un-termi-
nated, and if one of the two outputs is left open it will result in excessive jitter on both. PC board layout must take this and 50 ohm impedance matching
into account. Load matching and power supply noise are the main contributors to jitter related problems.
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 19:59[/i] Recently, at the China International Police Equipment Expo, EADS released the TETRA system with a dedicated 350MHz frequency ban...
[i=s]This post was last edited by fish001 on 2019-11-7 22:18[/i]Recently, a junior wanted to save his meal money to buy a genuine Atom STM32 development board to learn RTT. He saved for three days and...
[i=s]This post was last edited by chenbingjy on 2019-7-11 14:40[/i]My sensor circuit is as above.
There is a problem with this circuit. When the sensor is connected, there is voltage at both ends of C...
Hello everyone! I would like to ask, which type of room temperature sensor is used to collect the room temperature and send it to the microcontroller?...
At the end of 2023, the new energy vehicle market in China and even the world is still very lively: new models, new technologies and electrical architectures represented by Xiaomi are emerging in an ...[Details]
Raspberry Pi demonstrated an AI-enabled camera module at Embedded World 2024, developed in partnership with Sony, featuring on-module processing and compatible with the Raspberry Pi range. The Rasp...[Details]
Electromagnetic flowmeter is a kind of precision inductive instrument. If the selection or installation is unreasonable, it will have a great impact on the measurement accuracy and the service life o...[Details]
Today, Professor Mao Yuhai brings you some discussions on the power factor of LED lamps. Power factor has never been a problem. In the past, the country has stipulated that only when the power exceed...[Details]
(Image source: Tesla) As we all know, Tesla is in a leading position in the field of electric vehicles , and the range of its Model S, Model X and Model 3 models is also at the leading level in th...[Details]
Cornell University College of Engineering has developed a synthetic biosensor that mimics the properties of cell membranes and provides electronic readouts. The research, published recently in the ...[Details]
According to official news from Meizu, the Flyme 8 trial version was updated today, adding new functions such as smart WeChat picture selection and volume adjustment, and making the alarm settings mo...[Details]
According to 9to5 Google, many unofficial versions of LineageOS 19 based on Android 12 have been seen in the past few months, but now this third-party ROM is officially available. The offici...[Details]
Single-phase half-wave controlled rectification for resistive loads
Idealized assumptions:
1. The switching element is ideal
2. The transformer is ideal
...[Details]
Recently, Huawei celebrated that its AI Fabric intelligent lossless data center network solution passed the comparison test of the international testing organization Tolly Group. The results show t...[Details]
Correctly and reasonably selecting and installing sensors according to the motion properties of the end elements of the transmission chain is a necessary condition for accurately measuring the motion...[Details]
Electromagnetic flowmeters can be divided into two types according to the time of their failure: failure during the debugging period and failure during the operation period. The following are ...[Details]
IT Home reported on May 9 that today, foreign media 91mobiles exclusively revealed a real picture of a OnePlus mobile phone and called it OnePlus Ace Racing Edition (the Chinese name may be OneP...[Details]
On October 28, Shanghai Xinyang Semiconductor Materials Co., Ltd. (stock code: 300236, stock abbreviation: Shanghai Xinyang) held the first extraordinary general meeting of shareholders in 2021, and ...[Details]
Encoder control of inverter speed is a common industrial automation control method. It uses the encoder to monitor the motor's speed, position and other information in real time, and feeds this inf...[Details]
Integrated technical exchanges
京公网安备 11010802033920号
EEWORLD
