Vectron International's TRU-050 module is a user-configured, phase-locked loop (PLL) solution designed to simplify a wide variety of clock recovery and data retiming,
frequency translation and clock smoothing applications. The device features a phase-lock loop ASIC with a quartz stabilized VCXO for superior stability and jitter performance.
This highly integrated module provides unsurpassed performance, reliability and quality. The proprietary ASIC device includes a refined Phase Detector, a Loop Filter Op-Amp,
a Loss of Signal Alarm with Clock Return to Nominal feature, a VCXO circuit, and an optional 2n divided output.
The ASIC and quartz resonator are housed in a hermetic 16-pin DIL ceramic package with optional thru-hole or surface mount leads. The VCXO frequency (OUT1) and
division factor (OUT2) are factory set in accordance with customer specifications. PLL response is optimized for each application by the selection of three external passive
components. Software is available from Vectron to aid in loop filter component selection and loop response modeling.
is a user-configured phase-locked loop (PLL) integrated circuit. It includes a voltage controlled crystal oscillator (VCXO), an operational amplifier, a phase
detector, and additional integrated functions for use in digital synchronization applications. These applications include timing recovery and data pulse restoration for data
signals, clock frequency translation and smoothing, synchronous distributed clock networks, and clock frequency synthesis.
What is the output of the
phase detector?
The TRU-050 phase detector output
is a DC signal, under locked
conditions, and is nominally 2.5
Volts. The phase error (which is
typically a pulse for digital phase
detectors) is converted to a DC
level, making it easy to design
the loop filter.
TRU-050 Elements
Figure 4.
How long does the
TRU-050 take to detect
a loss of signal?
If there are no transitions on
DATAIN for a period of 256 clock
cycles, LOS is set to a logic 1.
LOS is reset to logic 0 as soon as
there are DATAIN transitions.
Phase Dete c t o r
The phase detector is designed to accept an NRZ data stream at DATAIN (Pin 7- refer to figure 5), but may be used
for clock signals and other data types. The input buffers are designed to switch at a TTL switching threshold of 1.4 V.
The phase detector’s inputs are:
• DATAIN (Pin 7) - the input clock or NRZ data signal
• CLKIN (Pin 9) - the clock signal feedback from the VCXO output OUT1 or OUT2
And the outputs are:
• RCLK (Pin 11) - the regenerated clock signal
• RDATA (Pin 12) - the retimed data signal
• PHO (Pin 6) - the phase detector output
• LOS (Pin 10) - a loss of signal detector
The phase relationship between the regenerated clock signal, RCLK (Pin 11), and the regenerated data signal,
to align the falling edge of the RCLK signal with the center of each RDATA pulse.
For applications where the input clock or data signal, DATAIN, is very low in frequency (<200kHz), clock
information may pass through the phase detector because of its finite low pass characteristic. In applications
such as this, an additional pole may be necessary in the loop filter to attenuate these AC components prior to
the VCXO input. Please contact Vectron’s Applications Engineering staff for further detail.
How is it
manufactured?
The TRU-050 is
assembled in
Figure 6.
“state of the art”
class 100 and class
10,000 clean
rooms using leading
edge, high volume
automation equip-
ment and advanced
ASIC technology.
Figure 7.
Figure 8.
Phase Detector Gain Calculation
The schematic diagram (figure 7) shows a simplified representation of the phase detector's basic error generation function. The actual circuit is more complex and includes
circuitry to reduce the
TRU-050's
dependence on input data duty-cycle. In general, the
TRU-050
is insensitive to duty cycle and duty cycle changes. This circuit provides a
output (V D) DC level which is proportional to the relative phase of DATAIN (Pin 7) and CLKIN (Pin 9). A plot of the output (VD) versus relative phase is shown in figure
8. The slope of the output (VD ) versus relative phase (0 e) is 5V/2π.
The phase detector block also includes an output gain stage which should be considered when calculating the gain of the complete phase detector block. This gain stage
has a gain of 2/3, and converts the differential signal to a single-ended DC output.
This guide includes a variety of solutions such as portable and line powered solutions, point-of-load solutions, isolated solutions, etc.It also includes emerging power applications such as power for ...
I have a Bluetooth module, the chip is STM32L151C8T6. Send AT commands and set parameters. The program is as follows: AT; ReceiveTime = 180; Receive_Cnt = 0; while(ReceiveTime > 0); flg = Search_Str(R...
[i=s]This post was last edited by wateras1 on 2016-4-9 23:25[/i] First of all, congratulations on EE's tenth anniversary{:1_124:}. In 2011, I was honored to become a member of the EE family. I was sti...
The intelligent driving community has its own rhythm. Some are busy pushing new versions and focusing on R&D, others are busy with publicity and promotion, and still others are immersed in mass pro...[Details]
1. Equipment Overview
Shell-and-tube heat exchangers are a common heat exchange device used in chemical evaporation and heating equipment. Currently, the tubesheets of shell-and-tube heat exch...[Details]
New energy vehicles are increasingly popular with consumers due to policies and energy conservation. Once you've purchased your vehicle, maintenance is essential. However, due to the different powe...[Details]
Capable of providing precise and efficient thermal management for artificial intelligence computing power, intelligent sensing and autonomous driving systems
Shenzhen, ...[Details]
On August 25th, TSMC, the world's leading contract chip manufacturer, attracted significant attention for its decision to build a chip manufacturing facility in Arizona. TSMC primarily manufactures...[Details]
Common Mode Semiconductor has officially released its latest generation of power management ICs—the GM6506 series. This fully integrated high-frequency synchronous rectification step-down p...[Details]
Since the beginning of this year, price wars have intensified, new models have been launched one after another, used cars with zero kilometers have become a hot topic, and the industry's internal c...[Details]
For autonomous vehicles to safely navigate the road, they must identify far more complex objects than just traffic lights, pedestrians, and other familiar objects. Among these obstacles is a crucia...[Details]
Since its invention in the mid-1940s, the microwave oven has evolved from a humble beginning to commercial use, entering homes in the 1960s and rapidly gaining popularity. Its basic functionality a...[Details]
The digital TV set-top box consists of a tuner, QAM demodulator, TS demultiplexer, MPEG-2 decoder, PAUNTSC video encoder, embedded CPU system and peripheral interfaces, CA module, and uplink data m...[Details]
While the current industry consensus is that autonomous vehicles are robots and that their systems are managed using robotics-developed thinking, there are also cases where autonomous driving is ac...[Details]
With the rapid development of electric vehicles in my country, people are beginning to pay attention to the issue of radiation from electric vehicles. We all know that mobile phones emit radiation,...[Details]
The difference between a series inverter and a parallel inverter is that they use different oscillation circuits. A series inverter connects L, R, and C in series, while a parallel inverter connect...[Details]
A pure sine wave inverter has a good output waveform with very low distortion, and its output waveform is essentially the same as the AC waveform of the mains power grid. In fact, the AC power prov...[Details]
With growing environmental awareness, the continuous improvement of three-electric technology and the increasing deployment of infrastructure such as charging stations, the electrification of new e...[Details]
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
