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Frequency multiplication method and frequency multiplier

A frequency doubling and frequency technology, used in pulse generation, electrical components, delay line pulse generation, etc., can solve the problems of frequency doubling output pulse width, lack of high-order harmonics, and reduced frequency doubling efficiency, and achieve low phase noise. , The main side frequency suppression ratio is excellent, and the effect of reducing phase noise

Inactive Publication Date: 2006-06-21
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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AI Technical Summary

Problems solved by technology

Due to the phase difference between the phase zero point of the input signal and the phase zero point of the output signal after frequency selection, the phase noise is high and the frequency stability is poor. In addition, the frequency multiplication output pulse is wide and the high-order harmonics are not abundant. , low frequency doubling efficiency
The current switch frequency multiplier accurately determines the pulse position through the zero point, improves the phase noise and phase jitter, and achieves the purpose of low-noise frequency multiplication. However, due to the limitation of the distribution parameters of the differential circuit, when the input frequency is high, the frequency multiplication pulse is relatively widening, frequency doubling efficiency is significantly reduced
The step diode frequency multiplier can generate narrow pulses with rich harmonics and has high frequency multiplication efficiency, but it is limited to high frequency bands with input frequencies greater than tens of megahertz

Method used

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Embodiment Construction

[0026] Part selection:

[0027] * Comparator (1) selects MAX913.

[0028] * "AND" gate delayer (2) selects 74F08.

[0029] * "AND" gate correlator (3) selects 74F08.

[0030] *Filter (4), (6) select 200MHzLC filter or crystal filter for use.

[0031] *The linear amplifier (5) is UT0-250.

[0032] *The power amplifier (7) selects A74-1 for use.

[0033] Depend on figure 1 As shown, the implementation steps of a frequency doubling method are as follows:

[0034] ①Input signal V f Connect to the input terminal of the comparator (M1), the reference voltage V o Connect to the level reference terminal of the comparator (M1), and the comparator (M1) outputs two square wave signals T 1 and T 2 , due to T 1 and T 2 by V f through V o is triggered, so T 1 , T 2 The frequency is equal to V f frequency, and their phase zeros are all related to V f tightly coupled together;

[0035] ②T 2 The access delayer (M2) outputs a delayed square wave signal T after the delay time ...

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Abstract

The invention discloses a frequency multiplication method and frequency multiplier. Wherein, first, accessing input signal into comparator to output square wave signal; second, outputting delayed square wave signal by AND gate delayer with delay time in nano-second level; third, inputting said two signals into two input end of logic AND gate correlator for calculation and output; fourthly, filtering and amplifying the narrow impulse from said correlator to complete the frequency multiplication. Wherein, it also comprises a linear amplifier and a power amplifier. This invention is simple and low cost, and had small phase noise in output signal.

Description

technical field [0001] The invention relates to a frequency doubling method and also a frequency multiplier, which can be widely used in the fields of radar, communication, quantum frequency standard, frequency stability measurement and the like. Background technique [0002] There are many ways to achieve frequency multiplication, but they can be roughly divided into two categories. One is to use a phase-locked loop to lock the higher output frequency of the voltage-controlled oscillator to a lower reference input frequency, thereby achieving frequency multiplication. The other is to use nonlinear devices, such as transistors, rectifiers, and step diodes, to make the waveform of the input signal nonlinearly transformed, and then connect to a band-pass filter or a tuned amplifier with appropriate selectivity to select the desired harmonic Wave to achieve frequency multiplication, this type of frequency multiplier more typical circuits include triode C frequency multiplicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/86H03K3/00
Inventor 王艳余钫鲁道邦陈智勇雷海东裘晓俊金鑫李超左毅力陈云起管妮娜朱熙文盛荣武
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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