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Atmel posts the datasheet for their AT89C51 and other microcontrollers on their website (see link below).
That datasheet specifies that the Atmel AT89C51 is operational for an oscillators in the range 24 MHz to 0 Hz (fully static paused).
However, during initial flash programming and verification, it requires an oscillator frequency in the range 24 MHz to 3 MHz.
That datasheet also answers many other questions you might have about this microcontroller.
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What is a frequency range of LC oscillator?
depends on the oscillator and its purpose
What is the frequency range of video frequency oscillator?
5MHz
What are the advantages of wien bridge oscillator?
RC phase shift oscillator is used to generate frequency in audio range and it is a fixed audio frequency oscillator where as wien bridge oscillator is a variable audio frequency oscillator for high frequency oscillations it is better to design wide band amplifier with LC network
Why you use crystal oscillator in 8085 microprocessor?
The oscillator provides the basic clock of a microcontroller to be able to execute the instructions in a stable, periodic way. It is often used for other peripherals too, like timer, UART, etc. as frequency base, usually divided by a clock divider for integer factors, or by PLL for rational factors. If the timing accuracy of these functions is not important, a simple RC oscillator can be used. Many microcontrollers have it internally. Accuracy is in 1...10% range. For better accuracy and temperature stability, a resonator can be used. For applications where timing is critical, a crystal can be used. Most micros have built-in oscillator, so only a crystal and two caps are needed. For those which have no built-in oscillator, external crystal oscillator module may be used. There are OCXO and TCXO modules available for very high stability needs.
What is the use of 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.
Why is a Clapp oscillator preferred to a Colpitts oscillator?
Advantages: Good wave purity Fine performer at high frequency Good stability at high frequency Wide operation range 1 to 60 MHz Disadvantages: Poor isolation (Load impedance v.s. frequency) Hard to design by samiur rahman hasib
What is a wobbulator?
A frequency-modulated oscillator is usually called a sweep generator today, but in 1935, it was called a wobbulator.The first wobbulators used a motor-driven variable capacitor to sweep (or wobble) through the desired frequency range. Later circuits used a Phantastron oscillator that worked well, but still had no good way to add markers.
What is the modulation of frequency?
It is a device or electronic circuit that changes the frequency of an oscillator according to the amplitude of modulating signal. For instance, if the modulation is linear, the modulator changes the frequency proportional to the amplitude of the modulating voltage.
What are the applications of hartley oscillator?
hartley oscillators are mainly used in radio receivers. Also note that due to its wide range of frequencies it is the most popular oscilator
How GHz range system clock frequency is generated If so Is it possible with transistor circuits or lumped circuit?
It's generated using a quartz crystal and frequency multipliers on a motherboard.
Viva questions for RC phase shift oscillator?
A phase-shift oscillator is a simple electronic oscillator circuit. It consists of an inverting amplifier element such as a transistor or op amp, with its output fed back into its input through an filterconsisting of a network of resistors and capacitors. The feddback network 'shifts' the phase of the amplifier output by 180 degrees at the oscillation frequency, to give positive feedback.[1] Phase shift oscillators are mostly used at lower frequencies, often in the audio frequency range as audio oscillators.
What is the use of oscillators?
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.
