edfa amplifier

There are several requirements for amplifier design:1. Maximum gain design2. Fixed gain design3. Minimum Noise figure design (Low noise amplifier design)The main difference is that the matching requirements of the input and output terminals are different.The matching requirements for the maximum gain design are:1. for the unconditionally stable S -parameter, the input and output of the conjugate matching;2.

for the execution of SRS sound replication systems, produced by seponx. There are already some processors on the market that claim to have the SRS function. When purchasing the software, you should first pay attention to the presence or absence of registered trademarks of the SRS lab. Secondly, specifies whether the SRS-specific center Adjustment Center and space control potentiometer are available. When SRS 5250s is used, it must be connected between the audio source and the Power

, the system is required to achieve channel merging and a wide data transmission band. The hardware structure of the USB data collection system is shown in Figure 1. 　　 The analog signal output by the sensor is connected to the signal amplifier through multiple switches. The signal amplifier can automatically adjust the gain and enlarge the input signal within the range of the/D converter, then the/D conve

.tar.gz We recommend that you use wget to download the link. Non-commercial cial Software Download The intel software development products listed below are available for free non-commercial cial download. Click on a product to initiate the download process. Non-commercial cial licenses are subject to thetermsOf non-commercial cial software development.Product suites Intel parallel studio Xe 2011 for Linux *Des intel C ++ composer XE, Intel Fortran composer XE,

a new four-color R, G, B, and E Solutions. Any technical solution requires four image points to form a color pixel. After the light is received, the photosensitive element generates the corresponding current, and the current size corresponds to the light intensity. Therefore, the electrical signal directly output by the photosensitive element is analog. In CCD sensors, each photosensitive element does not further process this, but directly outputs it to the storage unit of the next photosensiti

/PN or (S/N) dB = 10 lgps/Pn = psdb-pndb Carrier: indicates the relative strength of high-frequency carrier and noise. It is an important indicator of the transmission quality of constant RF signal channels and reflects the signal quality of audio and video signals after transmission and demodulation. It is represented by C/N. C/N = pc/PN or (C/N) dB = 10 lgpc/Pn = 20 lguc/UN pal (video with 5.75 MHz) the relationship between the carrier value of the transmission system and the signal-to-noise r

Function Overview ADBOX103A-V advertising machine control panel, integrated multimedia decoding, LCD driver, Ethernet, HDMI, WiFi, amplifier in one, support most of the current popular video and image format decoding, support HDMI video output, it is compatible with various tft LCD display screens and greatly simplifies the system design of the entire machine. It is very suitable for HD network hosts boxes, video advertising machines, and frame adve

[Infrared] principle of infrared remote control, infrared remote control Abstract:The infrared remote control device has the characteristics of small size, low power consumption, strong functions, and low cost. Therefore, after the color TV sets and video recorders, infrared Remote Control has also been adopted on recorders, sound equipment, air litter machines, toys, and other small electrical devices. In industrial equipment, infrared remote control is completely reliable and can effectively i

the manufacturing is difficult and the cost is high. Therefore, a sine oscillator circuit below kHz generally uses an RC oscillator circuit with a lower oscillation frequency. Common RC oscillator circuit There are two types: phase shifting and bridge. (1) RC Phase-Shifting oscillator has the advantages of simple circuit and economic convenience. However, the frequency selection function is poor, the amplitude is unstable, and the frequency adjustment is inconvenient, therefore, it is generally

"components" column ). select the "control function block (control_function_blocks)". Figure 6 (5) shows the content in the "components" column ). select "Voltage Control Source (controlled_voltage_sources)". Figure 7 (6) shows the content in the "components" column ). select "controlled_current_sources". Figure 8 2 shows the content in the "components" column. click "place analog components". Column 9 of "series" appears. Figure 9 (1 ). select "analog_virtual". Only three types of virtual comp

planning, as shown in Figure 1. From the graph, we can see that the coverage of downlink link decreases rapidly with the increase of the load factor of the cell, and the uplink only when the load factor of the neighborhood is close to 1 o'clock, the coverage area of the cell is reduced obviously, so the coverage of downlink is more dependent on the load than that of uplink. The reason for this is that, regardless of the number of users in the downlink, the maximum transmit power is also 40dBm,

you encounter no menu animation problems, it is easier to know the problem is note: If you modify Cfg_mmi_mainmenu_type, __mmi_mainmenu_type__ two macros, You will need a new, if you use remake, you may not have the expected results. The key word for the switch ring is power_on_tone, Power_off_tone; When the switching machine sound is not output from the audio amplifier, or there is no switch sound (when the audio

and reuse in the software world, the audio system of embedded devices can be divided into onboard hardware (machine),Soc (Platform), codec three parts, as shown: ①machine refers to a machine, can be a device, a development board, or a smart phone, it can be seen that machines are almost non-reusable, each machine hardware implementation may not be the same, the CPU is not the same, Codec different, audio input, output devices are not the same, machine for the CPU, CODEC, input provides a carrie

the speakers of the connection line is bad contact, loose and other phenomena. If the problem is still not solved, it is a faulty computer audio, or a computer card is faulty. Workaround Three: If the sound card setup problem, please open the Control Panel of your sound card settings interface (or double-click the system tray Small horn icon), check the channel balance is in the middle, if not, please adjust the left and right channel balance to the middle. Workaround

Many kinds of situation can cause the sound box to have the noise, for instance the speaker is disturbed, the interface or the connection line contact is bad, the sound box itself quality is inferior and so on. Generally speaking, the speaker is a lot of active speakers, its internal will certainly exist amplifier, so the noise is unavoidable, the source of noise from the source can be roughly divided into electromagnetic interference, mechanical noi