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Novel Triple-push cross-coupled oscillator

A cross-coupling and oscillator technology, which is applied in the field of new Triple-push cross-coupling oscillators, can solve the problems of low Q value of passive devices, large parasitics of active devices, and low gain, so as to reduce costs, solve low gain, Take advantage of integrated effects

Active Publication Date: 2020-01-17
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of triple-push cross-coupled oscillator for the technical defects in the prior art, so as to solve the problem of large parasitic, low gain and low Q value of passive devices in the existing terahertz frequency band The problem of obtaining a terahertz oscillator with high output power and low phase noise without using a frequency multiplier scheme to save layout area has a very broad application prospect

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  • Novel Triple-push cross-coupled oscillator

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The 3-push (Triple-push) cross-coupled oscillator circuit provided by the present invention is composed of 3 identical sub-circuits, each sub-circuit oscillates at the fundamental wave, and the third harmonic can be extracted by selecting a transmission line of a suitable size during design . First pass the fundamental frequency To determine the value of resonant cavity inductance L1 and capacitance C. In the terahertz band, the parasitic capacitance of the transistor is generally used to replace the required capacitance of the resonant cavity, that is figure 2 Medium Transistor M 1，2 of parasitic capacitance. By selecting the transmission line TL 1,2 The size of the th...

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Abstract

The invention discloses a novel Triple-push cross-coupled oscillator, wherein the three sub-modules are the same in structure and connected in parallel, each sub-module comprises a sub-circuit, the two ends of each sub-module are connected with a transmission line TL1 and a transmission line TL2 respectively, and the two ends of each sub-module are connected with a capacitor C1 and a capacitor C2respectively and connected to a balun circuit to achieve output; the sub-circuits have the same structure, and each sub-circuit comprises an MOS tube M1, an MOS tube M2, an inductor L1 and an inductorL2. According to the invention, compromise between a wide frequency modulation range and low phase noise can be realized. The problem of low output power of the oscillator caused by low gain of a terahertz band active device can be solved; and the CMOS process is adopted, so that integration is facilitated, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of cross-coupling oscillators, in particular to a novel triple-push cross-coupling oscillator. Background technique [0002] A general implementation of a terahertz oscillator. One is to use the fundamental wave to realize the terahertz oscillator. The main problem is that the Q value of the passive device is low, and the gain that the transistor can provide is small (the frequency in the terahertz band is already close to the characteristic frequency of the transistor, and the transistor has almost no gain at this time). In order to solve this problem, the SiGe or III-V process with better performance is selected, which brings about the problem of increased process cost, and the problem of low Q value of passive devices has not been solved, and the phase noise is still high. The second is to adopt the fundamental wave + frequency multiplier scheme. However, the loss of the passive frequency multiplier is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/12H03B5/02G06F30/36
CPCH03B5/1212H03B5/02
Inventor 傅海鹏郑玉学马凯学
Owner TIANJIN UNIV
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