Device and method for realizing wide-range multi-frequency band frequency division and frequency selection
A wide-range, multi-band technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of complex circuit design, and achieve the effect of reducing difficulty and risk, reducing development cost and development cycle
Active Publication Date: 2015-01-07
NANJING HOWKING COMM TECH
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Problems solved by technology
[0007] For the first and second methods, due to the use of multiple frequency synthesizers or multiple voltage-controlled oscillators, multiple sets of complex RF analog circuits are required, which have problems in terms of development cost, development cycle, design and verification difficulty and risk. more questions
Although the idea of using a phase-locked loop with a wide frequency division range in the third method has certain advantages compared with the first method and the second method, its circuit design is complicated, and a structure needs to be proposed in the prior art Reasonable digital circuit to achieve wide frequency division range
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[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. The principles, methods, and circuits described in this embodiment can be extended to different parameters and use cases, and all possible parameters and use cases are within the protection scope of the present invention.
[0028] Figure 1 to Figure 5 Shown is the view involved in the embodiment of the present invention, figure 1 Shown is a phase-locked loop circuit device, the reference frequency of which is 10MHz, and the local oscillator frequency to be synthesized ranges from 200MHz to 500MHz. This frequency range covers several radio frequency bands and is in principle continuously variable. The reference frequency of the phase-locked loop is passed by the phase detector, the filter of the loop filter, and the control of the voltage-controlled vibrator to generate a composite fr...
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The invention discloses a device and a method for realizing wide-range multi-frequency band frequency division and frequency selection. The device is a wide-range frequency division ratio continuously-variable digital frequency divider; the frequency division ratio is expressed by binary numbers; the binary numbers are inputted to different frequency division branches of the frequency divider according to different orders of magnitude; the outputs of the frequency division branches are combined and inputted into a frequency division combiner, and the clock outputs of required frequencies are carried out after the frequency selection of the frequency division combiner; and meanwhile, the frequency division combiner controls and selects the frequency division branches in a rest state or a running state according to the highest order of the frequency division ratio, so that the frequency division and the frequency selection within the wide range are realized. The device and the method have the beneficial effect that through a digital circuit frequency divider with logical design and reasonable structure, the briefness of a phase-locked loop, a voltage-controlled oscillator and other radio frequency simulation circuit parts is obtained, so that the development cost of a circuit is reduced, and the design difficulty and the risk are reduced.
Description
technical field [0001] The invention relates to the technical field of digital electronics, in particular to a device and method for realizing wide-range multi-band frequency division. Background technique [0002] As wireless technology is more and more widely used, it is often required that a transmitting or receiving device can be used in multiple different frequency bands. For example, in the spectrum range from 300MHz to 500MHz, multiple frequency bands are used in wireless remote automatic meter reading systems. We say this is a wide frequency range because the ratio of the frequency range to the center frequency is large. A flexible communication system should be able to operate over such a wide frequency range at will. [0003] At present, the method of frequency synthesis covering a wide range of multiple frequency bands is roughly realized through the following methods: [0004] 1. A plurality of frequency synthesizers, each of which covers a narrow frequency ra...
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IPC IPC(8): H03L7/18H03L7/08
Inventor 陈平孙东波单佩君
Owner NANJING HOWKING COMM TECH