XG-2102CA 212.5000M-LGPA

Oscillators are electrical circuits that produce a repetitive electrical signal, often a sine wave or a square wave. XG-2102CA 212.5000M-LGPA is a type of oscillator that utilizes a double injection-locked technology to produce a single frequency output signal, with sinusoidal output waveform. It is typically used in radio telemetry systems and radio data transmission systems.

Design and Operation of XG-2102CA 212.5000M-LGPA Oscillator

The XG-2102CA 212.5000M-LGPA oscillator is a type of injection-locked oscillator that is designed to have a relatively low phase noise and frequency pulling, creating a single frequency output from two independent oscillation frequencies. It is composed of two stages: a first stage with a temperature-compensated crystal oscillator (TCXO) and an injection-locked frequency divider, and a second stage with a voltage-controlled oscillator (VCO) and an injection-locked divider.

The TCXO of the first stage consists of two parts: an amplifier and an oscillator circuit connected by a negative feedback network, which provides a stable frequency. The oscillator is stabilized by a crystal that comprises of an AT-cut quartz crystal resonator, two capacitors in the tank circuit, and two varieties of transistors to provide an amplifying effect. The TCXO of the first stage is designed to have a high-precision output frequency of 212.5MHz, with a relative stability of ±2.110 ppm.

The frequency divider of the first stage has a variety of divider ratios, providing high-stability frequency outputs with different frequencies. The oscillation frequency in the first stage is injected into the VCO of the second stage. The VCO in the second stage is a dual-gate MOSFET with an associated network of capacitors and resistors to generate the output frequency.

The frequency divider of the second stage is injection-locked, providing a clean sinusoidal output. The frequency divider consists of two counters, which divide the frequency of the first stage by a factor of 2, 4, 8, and 16. The divider can handle frequency inputs up to 200MHz. The output frequency of the second stage can be adjusted by connecting a voltage ramp to the V-Ramp pin. The voltage ramp allows for coarse and fine adjustment of the output frequency.

Applications and Advantages of XG-2102CA 212.5000M-LGPA

The XG-2102CA 212.5000M-LGPA oscillator is typically used in radio telemetry systems and radio data transmission systems. The oscillator is designed to operate in temperature environments from -40°C to +85°C, reducing the frequency drift due to temperature changes. The wide input frequency range, low phase noise, and frequency pulling make it suitable for various data transmission systems.

The oscillator is especially suitable for oscillator circuits with low phase noise due to its high-precision output frequency with a low phase noise of -60 dBc/Hz at 1 kHz offset and a frequency pulling of 0.13 ppm/Volt pp. It can also be used in radio Frequency (RF) systems, which require a clean and low-phase noise waveform for optimum data transmission.

Conclusion

The XG-2102CA 212.5000M-LGPA oscillator utilizes double injection-locked technology to provide an output frequency with a relatively low phase noise and frequency pulling. It is typically used in radio telemetry systems and radio data transmission systems, especially for systems which require low phase noise waveforms for optimum data transmission. The oscillator has a wide input frequency range, low phase noise, and frequency pulling, making it suitable for various data transmission systems.