1:30 PM - 3:30 PM
[18p-PA1-8] Phase noise measurement of Butler crystal oscillator: Quartz crystal introduction to Base of BJT
Keywords:crystal, phase noise
One of the important performance indexes of the crystal oscillation circuit has phase noise properties.
When there is the phase noise reduction of the crystal oscillator, many efforts are accomplished, but it is a necessary for the phase noise improvement of a low phase noise and the carrier around and indispensable technique with the spread of digital radio communications networks recently until now.
By the presents, the circuit which used two unfinished crystal for Butler oscillator is suggested.
As a result, a result called -25dBc was provided with the carrier vicinity noise characteristics.
When there is the phase noise reduction of the crystal oscillator, many efforts are accomplished, but it is a necessary for the phase noise improvement of a low phase noise and the carrier around and indispensable technique with the spread of digital radio communications networks recently until now.
By the presents, the circuit which used two unfinished crystal for Butler oscillator is suggested.
As a result, a result called -25dBc was provided with the carrier vicinity noise characteristics.