Electronics Engineering

The Traveling Wave Tube Amplifier (TWTA) is widely used as a power amplifier in satellite communication systems. It amplifies signals in the microwave frequency range and is capable of providing high power output with low noise and distortion. TWTA technology has been utilized for several decades in satellite communication due to its reliable performance and efficiency.

The output impedance of a common source amplifier circuit is typically high. This is because the common source amplifier uses a resistor to provide biasing, which results in a high output impedance. However, this can be mitigated by using a current source instead of a resistor for biasing.

A unidirectional current controller device is a type of electrical on/off switch. In order for an item to work that is plugged into a particular outlet, the switch must be in the on position. It is like having lamps plugged into outlets that are controlled by only one switch.

To calculate the lowest frequency that can be generated using mode 1, we need to divide the crystal frequency by two. So, the lowest frequency that can be generated in this case would be 11.0592 MHz divided by 2, which is equal to 5.5296 MHz.

The resistor bypass in the ignition circuit is used when starting the engine. It bypasses the resistor to provide full battery voltage to the ignition coil, ensuring a strong spark for a quick and reliable engine start. Once the engine is running, the bypass is no longer needed and the resistor is re-engaged to limit the voltage to the ignition coil for normal operation.

No it will not. Think of a radio - you won't receive a station that is broadcasting on 200 khz while tuned to 192 khz.

there are 3 resistors of 5k each...hence the name 555

Energy signals are finite duration. That means if a random signal is energy type, all its realizations or its sample functions must be zero at infinity. So its expected value or mean is zero at infinity.

On the other hand, a stationary process has a time invariant mean. So if its expected value is zero in infinity, it will be zero in any time.

In summary if a stationary random signal is energy, its expected value must be zero every time. But It is not correct for all signals. So it is not energy type.

The full form of ITU in standards is the International Telecommunication Union. It is a specialized agency of the United Nations that focuses on developing international standards and regulations for telecommunications and information and communication technologies.

No, the Poynting vector does not point radially outward in the volume between the plates of a parallel plate capacitor. The Poynting vector represents the direction and flow of electromagnetic energy, and in the case of a static electric field between the plates, the Poynting vector is zero within the volume between the plates.

When a tri-state logic device is in the third or high-impedance state, it means that it is effectively disconnected from the circuit. This state allows multiple devices to share a common bus without interfering with each other. It is commonly used in buses and multiplexers to prevent conflicts and allow for efficient communication.

A transistor can electronically switch the output by controlling the flow of current between its two terminals, called the collector and emitter. It has a third terminal, called the base, which acts as a control input. When a small current is applied to the base terminal, it influences the flow of current between the collector and emitter terminals, effectively turning the transistor "on" or "off" and allowing it to change the output state.

current depends exponentially on voltage:

diode equation (approx.)

Idiode=k (exp (Vdiode/Vth)-1)

k=constant (saturation current, something like a femto ampère)

Vth=KT/q => 25.8 mV @ T=300 K, Vth is thermal voltage

K=Boltzmann's constant

T=junction temperature (Kelvin)

q=electron charge

http://hamradio.lakki.iki.fi/new/Datasheets/transistor_pinouts/case-14.gif

Picture in context can be found here:

http:/hamradio.lakki.iki.fi/new/Datasheets/transistor_pinouts

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The maximum voltage which can apply When diode in reverse bias..if it is exceed that voltage the diode may get damage.

Voltage is what is measured in volts. This is the electric potential difference between two places. The electric current is also measured so as to ascertain the voltage.

A capacitor is an electrical or elctronic semi conductive material which have the ability to store electrical charge and discharge when needed, and also used for timing a circuit and finally used for filtering in a circuit.

A capacitor is made up of two plates seperated by die-electric strength or material.

Thanks

my receiver is lock i want to open i dont know how can i open because i forget 4diget lock nomber what is the master code thanks

Polyester film capacitors are film capacitors using a dielectric made of the thermoplastic polar polymer material polyethylene terephthalate (PET).

We're JYH HSU(JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer. You may google search "JYH HSU" to find our official website.

It is because a mobile is operated on a battery with low power and therefore it sends signals on low(uplink) frequencies whereas a base station is driven by high power and can easily send signals on high(downlink) frequencies. This can be verified by Friis equation which says Transmitted power and Transmitted frequency are directly proportional.

A voltage transformer takes a primary voltage and steps it down to a smaller secondary voltage. This type of transformer will attempt to keep the secondary voltage at a specific ratio of the primary voltage. If you short it, massive current flow in the secondary is required to do this.

For a similar reason a CT should never be open circuited - because it attempts to push a specific ratio of primary current through the secondary. If you open circuit the secondary, it takes a massive voltage on the secondary to accomplish this.

Two diodes, whether or not discreet, cannot work together as a transistor. The diodes and transistor have different profiles to optimize them for their specific functions