Electronic-Circuit II Chap 4. Communication Systems
... • Carrier signal and Modulating signal are fed to the amplifier • Transistor can be used in any configuration (CE,CB, CC) • Modulating signal can be injected into any terminal (base, collector or emitter) ...
... • Carrier signal and Modulating signal are fed to the amplifier • Transistor can be used in any configuration (CE,CB, CC) • Modulating signal can be injected into any terminal (base, collector or emitter) ...
1 - KevinChant.com
... comprehensive and at the same time, the most keenly priced Radio testing instrument available on the market today. The A.W.A. “Radiola” Servicing Set is designed primarily to provide in compact form the apparatus necessary for the location of faults in Radio Receivers. With receivers provided with t ...
... comprehensive and at the same time, the most keenly priced Radio testing instrument available on the market today. The A.W.A. “Radiola” Servicing Set is designed primarily to provide in compact form the apparatus necessary for the location of faults in Radio Receivers. With receivers provided with t ...
FALL 2015 - Ecs.csus.edu
... There are a number of ways in which a signal may be distorted. In FM broadcasting and pulse code modulation, a signal may be distorted deliberately according to some plan before it is transmitted. At the receiver, since one knows the form of the predistortion, one may compensate for it rather precis ...
... There are a number of ways in which a signal may be distorted. In FM broadcasting and pulse code modulation, a signal may be distorted deliberately according to some plan before it is transmitted. At the receiver, since one knows the form of the predistortion, one may compensate for it rather precis ...
EET 2351 Lecture 2 - MDC Faculty Home Pages
... Pulse modulation usually aims at transmitting an analog signal over an analog low-pass channel as a quantized signal by modulation a pulse train ...
... Pulse modulation usually aims at transmitting an analog signal over an analog low-pass channel as a quantized signal by modulation a pulse train ...
Rate of change of frequency protection function
... The deviation of the frequency from the rated system frequency indicates unbalance between the generated power and the load demand. If the available generation is large compared to the consumption by the load connected to the power system, then the system frequency is above the rated value, and if i ...
... The deviation of the frequency from the rated system frequency indicates unbalance between the generated power and the load demand. If the available generation is large compared to the consumption by the load connected to the power system, then the system frequency is above the rated value, and if i ...
PowerPoint Slides
... • Capacitance – Removed the tiny capacitor in the base of the coil. Added a small 1-28pf trimmer across the coil pins, set it to a few pf and centered the coil slug. Measured the output of the mixer while clicking through all the channels - perfect lock on RX and TX across the whole range and a clea ...
... • Capacitance – Removed the tiny capacitor in the base of the coil. Added a small 1-28pf trimmer across the coil pins, set it to a few pf and centered the coil slug. Measured the output of the mixer while clicking through all the channels - perfect lock on RX and TX across the whole range and a clea ...
MS Word - Sonoma State University
... Two students are queried about the effect of passing the square-wave signal through the RC high-pass filter. They were told that the 3-dB break frequency, denoted by f-3dB, is four octaves below the fundamental frequency of the square-wave input signal. The square-wave fundamental frequency is given ...
... Two students are queried about the effect of passing the square-wave signal through the RC high-pass filter. They were told that the 3-dB break frequency, denoted by f-3dB, is four octaves below the fundamental frequency of the square-wave input signal. The square-wave fundamental frequency is given ...
Digital Metronome
... The output of the variable astable is also take to a series of counters and logic gates which divide the frequency of the output of the oscillator by 60 which gives an output of the same frequency in beats per minute as the frequency of the variable astable in Hertz (pulses per second). This means ...
... The output of the variable astable is also take to a series of counters and logic gates which divide the frequency of the output of the oscillator by 60 which gives an output of the same frequency in beats per minute as the frequency of the variable astable in Hertz (pulses per second). This means ...
fourier transformation and its application in cell phone
... signal processing including audio, speechs, images, video, seismic data, radio transmission, and so on. Many modern technologies including televisions, music CD’s and DVD’s, cell phone, movies, computer graphics, image processing, and fingerprints analysis and storage are in one way or other, founde ...
... signal processing including audio, speechs, images, video, seismic data, radio transmission, and so on. Many modern technologies including televisions, music CD’s and DVD’s, cell phone, movies, computer graphics, image processing, and fingerprints analysis and storage are in one way or other, founde ...
using only two transistors
... a simple oscillator. Figure 2 shows for comparison a well-known RF oscillator design. The simple oscillator keeps the amplitude of its output constant. We now modify the circuit so that the amplitude of the oscillations is much greater, and so that the transistor can be switched fully off. The value ...
... a simple oscillator. Figure 2 shows for comparison a well-known RF oscillator design. The simple oscillator keeps the amplitude of its output constant. We now modify the circuit so that the amplitude of the oscillations is much greater, and so that the transistor can be switched fully off. The value ...
Voltage-controlled Oscillators (VCO), Phase Locked Loop, and
... control voltage. VCOs are used in many communication applications such as frequency modulation, in the phase locked loop (PLL) for signal tracking and FM demodulation. There are many ways to design an electronic circuit for a VCO. One method uses a special diode called Varactor. This diode has capac ...
... control voltage. VCOs are used in many communication applications such as frequency modulation, in the phase locked loop (PLL) for signal tracking and FM demodulation. There are many ways to design an electronic circuit for a VCO. One method uses a special diode called Varactor. This diode has capac ...
Unusual Frequency Dividers
... becomes unreliable and temperature sensitive. An experimental circuit was constructed with a 74F74 which has a toggle frequency near 100 MHz. Using a 0.47 uH inductor for L and a 20 pF trimmer, the circuit was able to divide 400 MHz by 8 to give a 50 MHz output. (The circuit was not particularly sta ...
... becomes unreliable and temperature sensitive. An experimental circuit was constructed with a 74F74 which has a toggle frequency near 100 MHz. Using a 0.47 uH inductor for L and a 20 pF trimmer, the circuit was able to divide 400 MHz by 8 to give a 50 MHz output. (The circuit was not particularly sta ...
The Best QRP Amp in the World - PAN
... If the oscillator (Q12) is the same frequency as the crystal filter in the receiver, shielding the oscillator will prevent it from getting into the receiver. No problem with chirp or pulling was noticed with this design. The output of the mute circuit (Q4) is +12 Volts that may need adapting for the ...
... If the oscillator (Q12) is the same frequency as the crystal filter in the receiver, shielding the oscillator will prevent it from getting into the receiver. No problem with chirp or pulling was noticed with this design. The output of the mute circuit (Q4) is +12 Volts that may need adapting for the ...
FILTER CIRCUITS
... range of frequencies while suppressing others. The behaviour of an amplifier for a given frequency can be controlled by adding reactive elements - capacitors and inductors. Such circuits are usually called filters because they “filter” out frequencies except those lying in a selected range. The resp ...
... range of frequencies while suppressing others. The behaviour of an amplifier for a given frequency can be controlled by adding reactive elements - capacitors and inductors. Such circuits are usually called filters because they “filter” out frequencies except those lying in a selected range. The resp ...
UMS-3000-R16-G 数据资料DataSheet下载
... Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. The information in this publication is believed to be accurate and reliable. However, no responsibility is assum ...
... Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. The information in this publication is believed to be accurate and reliable. However, no responsibility is assum ...
Heterodyne
Heterodyning is a radio signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden, in which new frequencies are created by combining or mixing two frequencies. Heterodyning is used to shift one frequency range into another, new one, and is also involved in the processes of modulation and demodulation. The two frequencies are combined in a nonlinear signal-processing device such as a vacuum tube, transistor, or diode, usually called a mixer. In the most common application, two signals at frequencies f1 and f2 are mixed, creating two new signals, one at the sum f1 + f2 of the two frequencies, and the other at the difference f1 − f2. These new frequencies are called heterodynes. Typically only one of the new frequencies is desired, and the other signal is filtered out of the output of the mixer. Heterodynes are related to the phenomenon of ""beats"" in acoustics.A major application of the heterodyne process is in the superheterodyne radio receiver circuit, which is used in virtually all modern radio receivers.