Gigahertz Fundamental Frequency Low Phase Noise Oscillating Circuit

Abstract

The invention relates to a gigahertz base frequency low-phase noise oscillation circuit, comprising an oscillation loop; the oscillation loop comprises a low-noise amplifier and a dual-port sound surface wave resonator for compensating the phase of the low-noise amplifier; the input end of the low-noise amplifier is connected with the output end of the dual-port sound surface wave resonator; the output end of the low-noise amplifier is connected with the input end of the dual-port sound surface wave resonator. The dual-port sound surface wave resonator is fully connected to the oscillation loop, is used as a frequency stabilizing element, and also achieves a phase modulation effect without other phase shifting elements, so the Q value of the oscillation loop is improved, and the low-phase noise of the oscillation loop is ensured; the oscillation loop adopts the base frequency to work, has low harmonic clutter, and meets the demands of an onboard information processing system, a cloud computer and high-speed large-capacity (optical fiber and wireless) communication on the high frequency, high speed and low phase noise of a frequency source; the circuit is simple and compact in structure, low in power consumption, small in size, light in weight, wide in applicable range and safe and reliable.

Description

technical field [0001] The invention relates to a circuit structure, in particular to a gigahertz fundamental frequency low phase noise oscillation circuit, which belongs to the technical field of oscillation circuits. Background technique [0002] Electronic information processing and transmission have been widely used in the fields of radio and television, navigation, radar, optical fiber and mobile communication. With the development of electronic technology, the requirements for electronic information processing, transmission speed and miniaturization are increasing; such as airborne information processing Systems (radar, navigation, identification, etc.) put forward strict requirements on the harmonics, clutter, phase noise and volume quality of frequency sources; cloud computers and high-speed and large-capacity communication systems put forward new requirements on the speed and jitter performance of clock circuits , the traditional crystal phase-locked circuit has bee...

AI Technical Summary

Problems solved by technology

[0002] Electronic information processing and transmission have been widely used in radio and television, navigation, radar, optical fiber and mobile communications and other fields. With the development of electronic technology, the requirements for electronic information processing, transmission speed and miniaturization are increasing; such as airborne information processing Systems (radar, navigation, identification, etc.) put forward strict requirements on the harmonics, clutter, phase noise and volume quality of frequency sources; cloud computers and high-speed and large-capacity communication systems put forward new requirements on the speed and jitter performance of clock circuits , the traditional crystal phase-locked circuit can no longer meet the requirements of high frequency and high speed

[0003] The existing gigahertz frequency sources generally use crystal oscillators to stabilize the frequency, and use frequency doubling or phase-locking technology to obtain the required frequency, but the circuit structure is complex, the power consumption is large, and the volume is large; there are many harmonics and clutter, and the noise floor deteriorates

In addition, when the gigahertz frequency source uses a dielectric resonator to stabilize the frequency, the debugging is complicated, the weight is large, the volume is large, and the frequency temperature coefficient is large

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