353VB6A491T

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Oscillators

The 353VB6A491T is a type of oscillator device which is used to generate repetitive electrical signals (oscillations) with the objective of controlling the frequency or phase of a given signal. It finds application in many fields, such as in radio transmission, television receivers or as a timing device in computers. This article will discuss the application field and working principle of the 353VB6A491T oscillator.

Application areas

The 353VB6A491T oscillator finds application mainly in the radio and television transmission domains. In radio emission, it serves as the transmitter’s main frequency-control device. In television receivers, it helps to generate numerous intermediate frequencies that are used for processing the RF signal’s components. Finally, computing systems often use it as a timing device, as its regular output signal works similarly to a clock.

Working principle

The 353VB6A491T oscillator is an active device, meaning that it requires an external power supply. It is generally built around a pair of complementary transistors, also called cross-coupled, that work in an oscillating manner. The transistors receive the power supply and produce an amplified signal that is fed back to the input of the transistors. This positive feedback turns them back and forth at a rate that depends on the time delay of the transistors and the load of the oscillator. The output of the transistors is the oscillator’s signal, and is then filtered by a tank circuit, selecting the desired frequency.

The 353VB6A491T oscillator also features a temperature-compensated feedback. This feature ensures that the output of the device is immune to temperature fluctuations and maintains a substantially constant frequency. This is accomplished by implementing an extra circuit in the oscillator which measures the temperature and adjusts the feedback accordingly.

Conclusion

To summarize, the 353VB6A491T is a type of oscillator mainly used in radio and television transmission applications. Its core is based on two complementary transistors that work in an oscillating fashion, and it features a temperature-compensated feedback. Additionally, it finds application also in computers as a timing device used to create regular signal pulses.

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