Orthogonal local oscillator signal generating device and method with duty ratio of 25%
A local oscillator signal generation device technology, which is applied in the direction of transforming continuous pulse chains into pulse chain devices with required modes, devices that give pulses at different times, etc., can solve the problems of high power consumption of local oscillator signals, etc.
Pending Publication Date: 2020-01-17
GUANGZHOU RUNXIN INFORMATION TECH
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Problems solved by technology
[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a quadrature local oscillator signal generating device with a duty cycle of 25%, which can solve the problems of large power consumption of the local oscillator signal in the prior art.
[0006] The second object of the present invention is to provide a control method for a quadrature local oscillator signal generating device with a duty ratio of 25%, which can solve the problems of large power consumption generated by local oscillator signals in the prior art
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Embodiment 1
[0044] Since the IQ two-way signals with a duty cycle of 25% are firstly generated in the prior art, and then the phase calibration is realized through the IQ phase calibration module, this method not only requires an additional phase calibration module, but also increases the power of the wireless receiver. consumption and volume, and the duty cycle of the calibrated signal is easy to change.
[0045] Such as figure 1 As shown, the present invention provides a quadrature local oscillator signal generating device with a duty ratio of 25%, including two latches with the same structure, a positive terminal of a differential input clock, a negative terminal of a differential input clock, and an I-way differential clock Oscillation signal output terminal, Q-way differential local oscillation signal output terminal.
[0046] Wherein, the latch adopted in the present invention is a D latch, and each D latch includes a clock signal input terminal CLK, a data input positive terminal ...
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The invention discloses an orthogonal local oscillator signal generating device with a duty ratio of 25%. Two D latches with the same structure are cascaded to form a negative feedback loop. The generation of a local oscillation signal with a duty ratio of 25% is realized. Meanwhile, the phase difference of the two paths of IQ local oscillator signals is ensured to be 90 degrees; the problems of high power consumption, large size and the like of a wireless receiver caused by a method of firstly generating a duty ratio signal through a duty ratio generation module and then calibrating the dutyratio signal according to a phase calibration module in the prior art are solved, Meanwhile, the problem that the duty ratio is increased after a local oscillation signal passes through the phase calibration module can also be solved. The invention further discloses a control method of the orthogonal local oscillator signal generating device with the duty ratio of 25%.
Description
technical field [0001] The invention relates to the field of wireless communication circuits, in particular to a device and method for generating quadrature local oscillator signals with a duty cycle of 25%. Background technique [0002] Passive mixers are widely used in modern integrated wireless receivers, especially low-IF and zero-IF receivers, because they have no DC power consumption, low noise, and good linearity. The local oscillator signal is a necessary signal for the mixer, and the duty cycle of the local oscillator signal has a very important impact on the wireless receiving performance of the passive mixer. The smaller the local oscillator duty cycle, the better the wireless receiver can obtain. Large gain and smaller noise, but when the frequency of the local oscillator is high, it is difficult to realize the local oscillator with a small duty cycle, because the local oscillator signal with a duty cycle of 25% is usually used. [0003] In addition, modern wire...
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IPC IPC(8): H03K5/151H03K5/156
CPCH03K5/151H03K5/156
Inventor 王日炎莫培思王明照周伶俐张芳芳
Owner GUANGZHOU RUNXIN INFORMATION TECH