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To cut off unwanted frequencies, unwanted frequencies are called noise.
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∙ 15y ago
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What type of antenna is used in cellphone for FM?
LNA - Low Noise Amplifier
What operation Base Transceiver Station perform?
Transmitter section multiplexes baseband signals and modulates it with a carrier,then frequency translates IF to RF by frequency synthesizer and mixer. combines the power to transmit through a antenna before passing it through high power amplifier and bandpass filter. Receiver section passes RF through a band pass filter and low noise amplifier. Downconverts RF to IF by tunable local oscillator and mixer. further the signal is demodulated and demultiplexed before sending to ground communication equipments
What are the applications of jfet transistor?
The Junction Field Effect Transistor (JFET)exhibits characteristics which often make it more suited to a particular application than the bipolar transistor. Some of these applications are: - High Input Impedance Amplifier - Low-Noise Amplifier - Differential Amplifier - Constant Current Source - Analogue Switch or Gate - Voltage Controlled Resistor
What should I do to install a low pass filter if my amp doesnt have one?
A: Installing a low pass filter is only required if the frequency are not there or to eliminate the low frequency, If it is an audio amplifier you never will need low frequency since your mine hears cannot hear those frequency.
Why is differential amplifier preferred over single ended amplifier?
The input stage of an op amp is usually a differential amplifier; this is due to the qualities that are desirable in an op amp that match qualities in a differential amplifier: common noise rejection ratio; low input impedance, high output impedance, etc. The use of differential amplifiers in op-amps is to increase the input range and to eliminate common entries like noise.
WHAT is the role of an instrumentation amplifier in strain gauge measurement system and WHY do we place the amplifier before the filter in the channel?
The instrumentation amplifier provides isolation, and gain to the output of the Wheatstone Bridge. It is placed before filtering because the low output of the gauges would suffer from induced noise in the filter circuit if left unamplified.
What type of antenna is used in cellphone for FM?
LNA - Low Noise Amplifier
Why noise of Low Noise Amplifier increases if you want to increase gain of it?
That is the case with all amplifiers. The noise floor is always lifted when the gain is increased.
What operation Base Transceiver Station perform?
Transmitter section multiplexes baseband signals and modulates it with a carrier,then frequency translates IF to RF by frequency synthesizer and mixer. combines the power to transmit through a antenna before passing it through high power amplifier and bandpass filter. Receiver section passes RF through a band pass filter and low noise amplifier. Downconverts RF to IF by tunable local oscillator and mixer. further the signal is demodulated and demultiplexed before sending to ground communication equipments
What are the applications of jfet transistor?
The Junction Field Effect Transistor (JFET)exhibits characteristics which often make it more suited to a particular application than the bipolar transistor. Some of these applications are: - High Input Impedance Amplifier - Low-Noise Amplifier - Differential Amplifier - Constant Current Source - Analogue Switch or Gate - Voltage Controlled Resistor
What is LNB related to telecom?
Low noise block-downconverter.A low noise block-downconverter (or LNB) is the receiving device of a parabolic satellite dish antenna of the type commonly used for satellite TV reception. The device is sometimes called an LNA (for low noise amplifier), LNC (for low noise converter) or even LND (for low noise downconverter) but as block-downconversion is the principal function of the device, LNB is the preferred term, although this acronym is often incorrectly expanded to the incomplete descriptions, low noise block or low noise block converter.
What are the applications of jfet?
• High Input Impedance Amplifier. • Low-Noise Amplifier. • Differential Amplifier. • Constant Current Source. • Analog Switch or Gate. • Voltage Controlled Resistor. • JFET as a Switch • JFET as a Chopper • JFET as a Current source • JFET as a Amplifier • JFET as a Buffer
What has the author Henry Sin Kai Lau written?
Henry Sin Kai Lau has written: 'Broadband low noise amplifier'
Why positive feedback is not used in amplifier?
positive feedback makes regeneration of the input signal,which creates more noise. ANSWER: To feedback positive voltage will do nothing for noise or any other reason but force the amplifier to saturate to the hi rial or the low rail of the power supply
What should I do to install a low pass filter if my amp doesnt have one?
A: Installing a low pass filter is only required if the frequency are not there or to eliminate the low frequency, If it is an audio amplifier you never will need low frequency since your mine hears cannot hear those frequency.
Advantages of parametric amplifier over microwave amplifier?
Microwave and audio parametric amplifiers were used as low-noise amplifiers, to process low-level signals. Therefore their non-linearity probably never occurred in use. In principle, Manley-Rowe theory holds for any frequency combination, and should apply also in optics. I am not aware about the application in optics but it is clearly possible. In optical spectrum (frequencies above IR), however, quantum noise prevails above thermal noise, so low-noise amplification is usually not needed or not possible.
Why is differential amplifier preferred over single ended amplifier?
The input stage of an op amp is usually a differential amplifier; this is due to the qualities that are desirable in an op amp that match qualities in a differential amplifier: common noise rejection ratio; low input impedance, high output impedance, etc. The use of differential amplifiers in op-amps is to increase the input range and to eliminate common entries like noise.
