edfa amplifier

Switching power supply Control mode Switching power supply in normal operation, the load in the external interference will produce fluctuations, how to ensure that the load fluctuations in the condition of the output stability needs to control the knowledge of the theory to solve. In the design of switching power supply applied to the control mode mainly divided into two: one is to monitor the output voltage, adjust the PWM duty ratio, to ensure the stability of the output voltage, that is, vol

-click to add a task plan, next step, click Browse and find SHUTDOWN in the C: \ WINDOWS \ SYSTEM32 directory in the selection program for planning. EXE program and click the OPEN button. step 2: set the task execution time to "Daily", click Next, set the start time to "", click Next, and enter the user name and password as required, when you click Finish, open the Advanced properties of this task plan, and click Finish Step 3: In the pop-up SHUTDOWN window, click "task", and then enter "C: \ WI

current and input voltage.Unfortunately, this circuit was not very efficient.Efficiency can significantly improved with switching regulators.Fixed Output Voltage feedback networksA linear regulator includes an error amplifier that compares the voltage applied to its feedback pin to an internal re Ference.The regulator contains a controller with a feedback voltage amplifier this compares an external voltage

the rack is a systematic one, then inserting such a sense resistor may not be practical. Moreover, since the ground is not an ideal conductor, the ground voltages in different locations in the system may be different, so a differential amplifier must be used to achieve accurate measurements 2 3To overcome these current detection challenges, a high-end current sense amplifier has been created. These spe

The analog signal input of the ad conversion chip is fully differential, pseudo differential, single-ended input, where the fully differential input is the best, and at this stage the ADC converter in order to improve its performance, it is recommended that users use a fully differential input method. (AD7982, ADS8317, etc. can achieve the full differential input of the signal, figure 1 shows the application circuit of the AD7982, it is shown that the input is a fully differential input method),

audio modification of the circuit and modification of the details and skills are well-known, so modified after the sound, for our quiet is also guaranteed.The power amplifier ability of audio host:Many like the sound quality of heavy bass results, in the sound of the host amplifier is also flower through the mind, the debugging process felt good sound quality results, but in the use of the same as the inve

From: http://baike.baidu.com/view/3393911.html? Fromtaglist # sub3393911 It is mentioned in this article that audio tracks of these times can be directly transmitted to the power amplifier through HDMI for decoding and output. Introduction Next-generation HD audio tracks, simply put, are the following five specifications: lpcm (lossless compression), Dolby Digital plus (lossy compression), Dolby truehd (lossless compression) DTS-HD high resolution

Document directory DC Voltage Regulator (flow), the core function of Electronic Load, power MOS DC Voltage Regulator (flow), the core function of Electronic Load, power MOS Http://www.laogu.com/wz_15880.htm Designers use DC electronic loads to test power supplies, such as solar arrays or batteries, but commercial DC electronic loads are expensive. You only need to use the power MOSFET in its linear zone, you can make your own DC electronic load (figure 1 ). The load uses two simple feedback l

circuits is as small as possible, so we can no longer use large capacitors, so all the circuits adopt direct coupling. In this way, work at all levels will affect each other. Moreover, because the characteristics of the transistor are very sensitive to temperature, we must take measures to suppress the noise caused by temperature changes.Almost all methods are mirroring: Using symmetric circuits to suppress the effects of temperature or other noise. I will not talk about it much more. However,

/capture is started andStopped respectively. e.g. aplay, arecord. All dapm power switching decisions are made automatically by consulting an audioRouting map of the whole machine. This map is specific to each machine andConsists of the interconnections between every audio component (includingInternal codec components). All audio components that effect power are calledWidgets hereafter. 2. dapm Widgets==================== Audio dapm widgets fall into a number of types :- O mixer-mixes several ana

Foundation did not learn, the theoretical calculation of a kind of fear (learning when do not know what to do, when using the time only to find not learning).Scientists and engineersTransistor is a very basic and important knowledge in analog circuits.On the one hand, scientists (physicists, chemists, etc.) from the microscopic point of view of theoretical analysis, hypothesis and experiment, the development of transistors this device, with amplification, but the amplification effect is not ide

broadcast transmitter, dipole FM transmitting antenna, GPRS information publishing platform.The emergency broadcast control system platform allows you to set up scheduled and Automatic Broadcast of emergency broadcast programs, or enable manual emergency broadcast in real time. You can play a single broadcast terminal in any group or partition or in a unified manner. The platform can control the playback terminal. the control signal is sent by the broadcast and Broadcasting Control System Platf

Maximum power refers to the power supply in the unit time, the circuit elements of the largest amount of energy change, is the size and positive and negative physical quantities. In this case, the maximum output power is specified. The larger the maximum power, the more equipment the power supply can load. The maximum output power is also called instantaneous power, or peak power. For the amplifier, the maximum output power is in a certain har

A set of HiFi equipment is expensive, how to make its service life longer? The following is the basic common sense of the daily maintenance and use of some sound. First, pay attention to the temperature. Any electronic components have their own normal operating temperature. The normal operating temperature of the audio equipment should be 18-45 degrees Celsius. The temperature is too high easy to burn components or make components early aging, too low will reduce some machines (such as the tube

amplification, drive relay.Generally, an integrated signal amplifier chip is used to amplify the signal. CX20106 is a dedicated integrated preamplifier for Sony, consisting of preamplifier, limiting amplifier, bandpass filter, detector, integrator and integral circuit. The preamplifier has an automatic gain control function to ensure that the amplifier has a hig

The PLL is an abbreviation for the phase-locked Loop, and the Chinese meaning is a phase-locked loop. The PLL is essentially a closed-loop feedback control system that allows the PLL output to maintain a fixed phase relationship with a reference signal. The PLL is typically composed of a phase detector, a charge amplifier (Charge Pump), a low-pass filter, a voltage-controlled oscillator (electrical), and some form of output converter. To make the PLL'

-honeycomb layer can not be achieved, the frequent operation of compression mode will cause the waste of system capacity and reduce the uplink coverage, if the frequency measurement is not enough timely and sufficient, it may also increase the probability of losing the speech due to the hard switching failure. Scheme III: The original base station to expand to Multicarrier, the premise is that operators have multiple carriers, the solution advantage is: The lowest cost of expansion, compared to

application wavelength is 1 550 nm. Of course, 1 310 nm wavelength division multiplexing is also being developed. The spacing between adjacent channels of coarse Wavelength Division Multiplexing (large wavelength interval) is generally greater than or equal to 20 nm, and the number of wavelengths is generally 4 or 8 waves, up to 16 waves. When the number of multiplexing channels is 16 or less, the CWDM system has more advantages than the DWDM System in terms of cost, power consumption requireme

During the differential transmission of twisted pair wires, for external interference signals, the two twisted pair wires are equivalent to the Same conductor, and the interference signals have the same amplitude and polarity on the two wires. At the input end of the differential amplifier, if the CMR value of the two-wire common mode input is large enough to receive the difference amplifier, it can be well

To introduce the push-pull circuit, first introduce some basic knowledge about the power amplifier. From the point of view of energy control, there is no essential difference between the power amplifier circuit and the voltage amplification circuit, but the latter requires that the load receive a voltage signal without losing its original strength, the requirement of the former is to get a certain amount of