BJ-161.1328MBE-T Crystals, Oscillators, Resonators

Absolute Pull Range (APR):	±50ppm
Current - Supply (Disable) (Max):	--
Height - Seated (Max):	0.059" (1.50mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	80mA
Operating Temperature:	-40°C ~ 85°C
Series:	BJ
Frequency Stability:	±50ppm
Voltage - Supply:	3.3V
Output:	LVPECL
Function:	Enable/Disable
Frequency:	161.1328MHz
Type:	VCXO
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Oscillators are electrical or electronic circuits that oscillate or generate a periodic, sometimes almost sinusoidal waveform, typically a sine wave or a square wave. Oscillators are used in a variety of applications to create an output that is periodic, or nearly so, and often of a known frequency. One example is BJ-161.1328MBE-T, a temperature compensated crystal oscillator. This article will discuss in depth the applications and working principles of this specific oscillator.

Applications

BJ-161.1328MBE-T is a high accuracy zinc alloy oscillator with a frequency range of ±100 ppm that offers a BC817-16 bipolar transistor with extreme stability even in caustic conditions. It is ideal for low power and portable applications, such as portable computers, healthcare monitoring devices, digital thermometers, GSM modules, and anything else that requires strict accuracy and stability.Additionally, this oscillator can be used for frequency control as well as for generating control signals for microprocessors, such as PLLs, ADCs, and frequency dividers. It offers high frequency accuracy and long term stability, making it perfect for use in wireless radio communication systems, home automation, and many other electronic devices.

Working Principle

The BJ-161.1328MBE-T uses a temperature compensated crystal oscillator (TCXO) design to achieve its tight stability in various environments. The oscillator is based on a quartz crystal in a circuit with an amplifying transistor, which is temperature compensated using the following circuit.At the heart of the oscillator lies a quartz resonator, with electrodes in it. This quartz resonator vibrates at its natural frequency when current is supplied to it through its lead wires. The oscillator circuit is made up of a transistor, two diodes, two capacitors, and the quartz resonator.The oscillator is designed so that when the crystal vibrates at its frequency, it will create an alternate current, which is then amplified by the circuit. This amplified current is then rectified and passed through a low pass filter, which converts it back into a sine wave. The sine wave is then used to control the oscillator circuit.The oscillator is designed to be extremely stable, even over a wide range of temperatures. This is due to the fact that the frequency of the quartz crystal is dependent upon its temperature. Thus, by using very precise components, the oscillator can compensate for any changes in temperature, ensuring that its output is always at the correct frequency.

Conclusion

The BJ-161.1328MBE-T is a high accuracy oscillator that can be used in a variety of applications, such as healthcare monitoring devices, GSM modules, and radio communication systems. Its TCXO design ensures extreme stability even in caustic conditions, making it ideal for low power and portable applications. Its working principle is based on the quartz resonator vibrating at its natural frequency when current is supplied to it and the circuit amplifying, rectifying, and converting the crystal’s vibration into a sine wave.

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