It's generated using a quartz crystal and frequency multipliers on a motherboard.
The Development of Computers was made possible by the development of the transistor.
The invention of the transistor - and the later invention of the integrated circuit, which uses transistors - made it possible to have thousands, and eventually millions and billions of components on an area of a few square centimeters, making it possible to produce complicated circuits, and thus build lots of electronic devices, including modern computers.
Trasmitting stations have their own transmitting frequency. No one can construct an amplifier which amplifies signals over a wide range. So every transmitting frequency has to be changed to one particular frequency. This is known as INTERMEDIATE frequency (IF) This is quite possible by getting beats. So a signal is to generated whose frequency is just more than the incoming frequency by IF This signal is named as local singnal which is generated by the LOCAL oscillator.
Trasmitting stations have their own transmitting frequency. No one can construct an amplifier which amplifies signals over a wide range. So every transmitting frequency has to be changed to one particular frequency. This is known as INTERMEDIATE frequency (IF) This is quite possible by getting beats. So a signal is to generated whose frequency is just more than the incoming frequency by IF This signal is named as local singnal which is generated by the LOCAL oscillator.
Those made it possible to build components much cheaper, to put lots of components into a tiny space (modern ICs have the equivalent of billions of transistors; in the past, each transistor used to be a separate component); and to work with a very low power consumption per transistor.
The transistor
The circuitry that makes up the inner workings of a computer comes from transistor type circuits. These transistor circuits are configured to have only two states. For example, their output voltage might be either 5 volts or 0 volts. Because there are only two output states possible, it's very convenient to use Boolean logic to design these circuits since you can represent each state by a one(1) or zero(0), a 'Yes' or 'No', or a 'True' or 'False,' thereby able to easily exploit the Boolean operators.
No.
The transistor
Because the series resonant circuit has the lowest possible impedance at resonance frequency, thus allowing the AC current to circulate through it. At resonance frequency, XC=XL and XL-XC = 0. Therefore, the only electrical characteristic left in the circuit to oppose current is the internal resistance of the two components. Hence, at resonance frequency, Z = R. Note: This effect is probably better seen with vectors. Clarification: Resonant circuits come in two flavors, series and parallel. Series resonant circuits do have an impedance equal to zero at the resonant frequency. This characteristic makes series resonant circuits especially well suited to be used as basic pass-band filters (acceptors). However, parallel circuits present their maximum impedance at the resonant frequency, which makes them ideal for tuning purposes.
This is a highly technical subject. It is not possible, or desirable, to fully explain it here. Basically electromagnetic waves of the appropriate frequency are generated, these are then manipulated (called modulation) in various ways to carry information.
because transistor is not too hot while vacuum tubes are very easily to get hot