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Oscillators

An oscillator is an electronic device that produces a periodic, oscillating electrical signal, often a sine wave or a square wave. Oscillators convert direct current (DC) from a power supply to an alternating current (AC) signal. They are widely used in timing, synchronization, analogue-to-digital conversion and many other capabilities.

511FBB106M250AAGR Application Field and Working Principle

511FBB106M250AAGR is a voltage controlled oscillator (VCO) product from a manufacturers such as Fox Electronics, which specially designed for PCS/CDMA applications. It is a type of frequency synthesizer used in communication systems.

The 511FBB106M250AAGR VCO provides a wide selection of frequencies from 1880 MHz to 1990 MHz and can be modulated from -5 to + 13 dBm. In addition, it offers good phase noise, low power consumption, wide control voltage, small size, and good harmonic performance which is suitable for a wide range of applications including portable radios and base station.

The working principle of the 511FBB106M250AAGR VCO is based on electric oscillation generated by two capacitive-inductive circuits (LC circuits). The current flowing in the LC circuit produces an alternating electromagnetic field. When this alternating field reaches the resonant frequency, the oscillations occur in LC circuit. The frequency of oscillation is related to the capacitance and inductance value in the circuit.

It has a voltage tunable circuit in which a varicap diode makes up one part of the LC circuit. This diode acts as a capacitor and its capacitance will vary depending on the applied voltage. By varying the voltage applied to the diode, the frequency of oscillation can be changed. The 511FBB106M250AAGR VCO also has a frequency control input that can be used to modulate the frequency of oscillation. The frequency of oscillation can also be changed by varying the inductance of the LC circuit.

In conclusion, the 511FBB106M250AAGR VCO is a reliable and accurate frequency synthesizer that is widely used in PCS/CDMA applications. It offers a wide range of frequencies, good phase noise, low power consumption, wide control voltage, small size, and good harmonic performance. The working principle is based on the electric oscillations generated by two LC circuits. The frequency of oscillation is controlled by varying the voltage applied to the varicap diode and the inductance of the LC circuit.

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