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
-speed single channel transmission, can realize the ultra-large capacity of the transmission system. Excellent solution to the problem of insufficient capacity.2. Ultra Long Distance wavelength division transmission System There is a problem that needs to be solved, that is, in the transmission to a certain distance after the light power will become smaller, then how to solve this problem? We can design the scheme--the EDFA erbium-doped fiber amplifier
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
Happy Shrimphttp://blog.csdn.net/lights_joy/Welcome reprint, but please keep the author informationThe geometric moment is theHuin the1962with translational, rotational, and scale invariance. OpenCVThe calculation of the moment is determined byC + +in theMomentsThis class comes complete with://! Raster image Momentsclass Cv_exports_w_map moments{public: //! The default constructor Moments (); //! The full constructor Moments (double m00, double M10, double m01, double M20, double M11
HTML5 Canvas transform is a matrix transformation, a kind of coordinate deformation.Three ways to deform coordinates, pan translate, scale scales, and rotate rotate can all be done by transform.Transform (M11, M12, M21, M22, DX, dy): This method must multiply the current transformation matrix by the following matrix:
M11
M21
Dx
M12
M22
Dy
0
described how auto_ptr and shared_ptr have shown this concept in heap-based resources. But not all resources are heap-based, and for that kind of resource, we need to build our own resource management classes. (stacks, which are automatically managed by the compiler, do not require manual control by the programmer; heap: Generation and release are controlled by programmers.) )
Problem arisesWe handle mutex objects of type mutex and use a class to manage it.void lock(Mutex* pm);void unlock(
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