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.
This is a switch input circuit composed of four diodes that I saw on the Internet. The analysis is as follows: 1. When SW1 is open, R7-D5-R5 forms a path, the voltage at point A is about 10V, point B ...
[list=1] [*][size=4][color=#000000]Single-step operation is possible, but continuous operation always returns to address 0: Watchdog is not turned off, and continuous operation resets DSP back to addr...
We are a testing machine manufacturer. Our boss said that in order to prevent customers from not paying, we need to put a clock chip in the lower computer.
Used for timing. If the customer does not pa...
[size=4][color=#000000]According to the strong advice of ALTERA's official FAE (field application engineer), please be careful not to plug or unplug your JTAG download interface while it is powered on...
On-site craftsmanship is the backbone of the product manufacturing process of PCBA factories. On-site craftsmen must identify product manufacturing difficulties in advance, prevent and control various...
//This is a C51 microcontroller serial port receiving (interrupt) and sending routine, which can be used to test the interrupt reception
// and query transmission of the 51 microcontroller. In addit...[Details]
On December 21, 2023, WPG Holdings, a leading international semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary Quan Ding launched
a 2KW PSU ...[Details]
China Energy Storage Network News:
Recently, the National Development and Reform Commission released the temporary UHV DC transmission prices for Shaanxi-Hubei and Ya'an-Jiangxi. This is th...[Details]
Metal oxide varistors (MOVs) are commonly used for transient overvoltage suppression in AC transmission line voltage applications. Lightning, switching of inductive loads, or switching of ca...[Details]
With the rapid development of the economy, the use of dangerous items that are prone to cause fires in production and life is increasing, and the risk of fire has also increased accordingly. The nu...[Details]
Introduction to FPGA
Field Programmable Gate Array (FPGA) is a general-purpose user-programmable device first developed by Xilinx in the United States in 1984. FPGA has both the high integrati...[Details]
This scheme first uses solar energy to power supply and combines it with people's daily needs to design a multifunctional solar mobile power box, and then uses Multisim simulation software to simulat...[Details]
The biggest enemy for human beings, besides various natural disasters, is the disease that everyone may face. The main means of treating diseases are surgery and drugs, and technology can also br...[Details]
LiDAR is a device that measures the precise distance between an object and a sensor by emitting lasers. It is widely used in the fields of driverless cars and robots and is known as the "eyes" of rob...[Details]
I am going to learn UBoot, I downloaded a TQ2440 UBoot, and I am going to use its USB download function. However, the usb_slave in TQ2440 UBoot only gives the compiled binary file, which is very unpl...[Details]
This paper introduces a method of simulating PLC control with Atmel89S51 single-chip microcomputer, designs a controller suitable for rigid clutch punch press, introduces the basic structure and wo...[Details]
The small-diameter metal rotor flowmeter adopts the variable area measurement principle. The flowmeter is an all-metal structure with a PTFE lining inside. It is suitable for corrosive gases. There a...[Details]
On February 27, Jinguan Co., Ltd. and Shanghai Ronghe Yuanchu Energy Co., Ltd. (hereinafter referred to as "Ronghe Yuanchu") signed a strategic cooperation agreement in Shanghai. Xie Lingjiang, Cha...[Details]
I compared the cost-effective iQOO 3 and the offline-focused X30 Pro_Sina Public Test As usual, I still got the latest iQOO 3 released by iQOO as soon as possible. I compared the cost-effecti...[Details]
The so-called level refers to the logarithm of the ratio of two powers or voltages. Sometimes it can also be used to express the logarithm of the ratio of two currents. The unit of level is decibel...[Details]
Analog electronics
京公网安备 11010802033920号
EEWORLD
