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 encountered a problem in ccs: how to split the program in ccs, that is, to divide a .c file into several files, and then write related modules in each file, and finally integrate them through the ma...
I have two such SMD MCUs, and I have never locked the MCU by mistake, because I know the minefield of AVR. The first one: after setting the clock with CKSEL0-3, the chip was locked, and ISP download w...
This is a typical circuit of the reference voltage chip TL431. I don't quite understand how this transistor increases the output current. In addition, many typical circuits in three-terminal regulator...
1) Create a new Cmd_menu.c in the common folder 2) Add the following code to Cmd_menu.c #include
#includevoid main_menu_usage(void) { printf("[1] Burn bootloader to nandflash"); printf("[2] Burn Linux...
In Visual Basic 6 and the Keithley GPIB card , the call to run the LIV test looks like this:
Call Send(kth2602, “LIVTest()”, status) ‘run function LIVtest()
Among them, Kth2602 represents the test equ...
Safety is the top priority in the production process, especially for dangerous operations. When the high-voltage line is shut down for maintenance, it is necessary to follow the regulations of powe...[Details]
Signal sources have developed to a very wide range today. We can classify them according to the frequency range: ultra-low frequency (0.1m～1kHz), audio (20Hz～20kHz), video (20kHz～10MHz), radio fre...[Details]
DC regulated power supply is a commonly used electronic device, which can ensure stable output voltage when the grid voltage fluctuates or the load changes. A low ripple, high-precision regulated p...[Details]
introduction
Usually, there are many input and output ports in RF systems, and it is expensive to use a multi-port network analyzer to analyze scattering characteristics. Therefore, it is ...[Details]
summary
Theoretically explains how to set up a PFC boost regulator using a current sensing transformer with the UCC3817 control IC.
1. Schematic
The schematic diagram is show...[Details]
A well-designed electronic load is not designed just for use in the lab; it should be carefully designed and built to test actual power systems. This is true for military portable systems, such as ...[Details]
1. Introduction
The UCC28051 reference design is a 100W offline AC/DC voltage converter with power factor correction (PFC). This power module design is intended to illustrate how to proper...[Details]
Preface
In recent years, many compact portable electronic products have been developed, such as mobile phones, digital cameras, MP3, MP4, PDA, GPS and DVD, etc. They are not only small in size...[Details]
TMS320C62X is a new generation of high-performance fixed-point digital signal processor (
DSP
) chip
from Texas Instruments (
TI
). The software design problem based on
DSP
is to use...[Details]
Application of TWLA500 in ADC and related fields
FAE: On-site technical support.
Provide technical support for the application of the products you sell, and handle quality issues ra...[Details]
In recent years, with the rapid economic growth, wireless communication has developed rapidly. Since spread spectrum signals have the characteristics of anti-interference, confidentiality, anti-det...[Details]
With the rapid development of the automobile industry, the requirements for automobile control, communication and networking are becoming more and more complex. The new generation of electronic co...[Details]
With the continuous development of the national economy, the application of variable frequency speed regulation devices is becoming more and more extensive. How to break the monopoly of foreign produc...[Details]
Mesh network architecture and advantages
The Internet is a flat network. The routers that make up the Internet are on the same plane. The mesh network formed by multiple paths between ...[Details]
0 Introduction
Electric vehicles are high-tech products that integrate computer technology, communication technology, electronic technology, and new material technology. They have a complex ...[Details]
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
