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How do you convert low frequency to high frequency with a circuit?
You typically create a DC power supply from the low frequency, and use that to run a high frequency oscillator and amplifier. If there needs to be a relationship between frequency in and frequency out, often there is a divider running on the high frequency side in combination with a phase locked loop synching up to the low frequency side.
How t convert high frequency into low frequency?
To covert a high frequency to a low one, we use flip-flops.
What is the difference between TTL and CMOS interms of fan infan outlogic levelspropagation delay?
The power dissipation of CMOS devices is around 100 times lower than the value of power dissipation for TTL. This makes CMOS more suitable for devices to run on battery power and devices allows like mobile phones to have a longer batter life. CMOS devices only use power when switching from one state to the other state (high to low, or low to high) so on they need power for less of the time than TTL devices which use current and dissipate power all the time that they have a power supply.
What does a transmission system at a radio station use to convert a direct current into a high frequency alternating current?
a high power, often class C amplifier.
What are the advantages frequency modulation amplitude modulation?
Frequency modulation have some advantages over amplitude modulation, FM is not sensitive to the amplitude noise, and have high efficient use of transmitted power
How does submarines talk to each other?
They use the power of Puff the magic dragon's fart which sends high frequency waves to each submarine.
Which frequency levels does space propagation use?
Extremely high frequency (EHF) and SHF
What does 'FM compatible' mean with hearing aid devices and What is the use of this function?
FM compatible hearing aid devices means that that the Frequency Modulation is okay.
Advantage of a choke coil over a resistor in a power supply filter?
A choke is an inductor. For typical power frequency, an inductor will slightly change the power factor, but will not actively use much energy. An abnormal voltage spike on a power supply is equivalent to voltage at a much higher frequency. Inductors appear to be a much greater impedance to high frequencies. This allows the choke to pass "normal" power, while at the same time it blocks "abnormal" power.A resistor acts independent of frequency. It will limit the effects of the high frequency voltage spikes by dissipating their energy, but it will do the same for the normal power system frequency. In effect, it is always using power, when the choke only uses what you don't want to get to the power supply.
What is the use of capacitor before input of power supply AC?
They are used to offer a low impedence path to high frequency interference from switching sources such as fridges and thermostats. Also to curb radio frequency breakthrough.
Does the Air Force really use microwaves or electromagnetic frequency devices to cause people to have heart attacks?
No.
What devices use transformers?
Transformers are used to change the voltage in a circuit from high to low or from low to high. Some of the gadgets that use transformers include surround sound systems, the CPU power supply and speakers which have inbuilt amplifiers.
