578L320CAT

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Oscillators

The 578L320CAT is an oscillator type device. It is a low power, low phase noise, voltage-controlled oscillator module designed for use in a wide range of applications. The 578L320CAT is capable of producing frequency outputs from 13.6 MHz to 32 MHz with excellent linearity and phase noise performance.

Application Field

The 578L320CAT is designed for use in a range of applications, including wireless communication applications such as local area networks (LAN) and wireless local area networks (WLAN), wireless radio systems, space level communications, satellite technology, avionics, GPS receivers, instrumentation, signal acquisition, and radio frequency identification (RFID) systems. It is also suitable for use in consumer devices such as digital cameras, mobile phones, portable music players, and Personal Digital Assistants (PDAs).

Working Principle

The 578L320CAT operates on the principle of phase-locked loop (PLL) technology. A phase-locked loop is a feedback system that combines an oscillator and a phase detector to maintain a constant frequency output. The PLL consists of a voltage-controlled oscillator (VCO), a loop filter, a phase detector, and a divider. The frequency of the VCO is determined by the voltage applied to its control pin. The loop filter is a low-pass filter, which provides the DC voltage level that control the VCO frequency. The phase detector compares the two input signals (VCO output and divided signal) and generates an error signal. This error signal is then filtered by the loop filter and applied to the VCO.

The divider divides the output signal of the VCO into two signals, a divided signal and a signal then fed back to the VCO. The divided signal is used for reference and the signal fed back to the VCO allows the VCO to be phase-locked to the reference signal. The divider can be programmed to divide the output of the VCO by an integer value. This allows the use of the 578L320CAT to generate a wide range of frequencies.

In addition to the VCO, loop filter, phase detector, and divider, the 578L320CAT also includes an internal temperature compensation circuit that ensures stable operation over a wide temperature range. This ensures that the phase error and frequency stability of the device remain within specifications over the temperature range specified by the manufacturer.

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