Wireless radio frequency transmitter
A wireless radio frequency and transmitter technology, applied in the field of wireless radio frequency transmitters, can solve the problem of destroying phase noise and achieve the effect of improving anti-interference ability
Inactive Publication Date: 2018-08-17
NANJING ZGMICRO CO LTD
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Problems solved by technology
Since the integer multiple harmonics of the local oscillator clock signal have the same frequency as the oscillation signal output by the VCO, it will cause traction to it and destroy its phase noise
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[0012] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure or characteristic that can be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. Unless otherwise specified, the words connected, connected, and joined in this document mean that they are electrically connected directly or indirectly.
[0014] Please refer to figure 1 As shown, it is a schematic circuit diagram of a wireless radio frequency transmitter in an embodiment of the present invention. figure 1 ...
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The invention provides a wireless radio frequency transmitter, including a first up-converter, a second up-converter, a first power amplifier and a second power amplifier, wherein the first up-converter includes a first up-conversion unit and a second up-conversion unit, the input end of the first up-conversion unit receives a signal I, the clock end thereof receives a local in-phase clock signal,and the output end thereof is connected to the output end of the first up-converter; the input end of the second up-conversion unit receives a signal Q, the clock end thereof receives a local quadrature clock signal, and the output end thereof is connected to the output end of the first up-converter; the second up-converter includes a third up-conversion unit and a fourth up-conversion unit, andthe main difference from the first up-converter is that the clock end of the third up-conversion unit receives the local quadrature clock signal, and the clock end of the fourth up-conversion unit receives the local in-phase clock signal. Compared with the prior art, by adopting the scheme of the invention, interference signals that cause traction to a VCO can be greatly cancelled, and thus the anti-interference ability of the VCO can be improved.
Description
【Technical field】 [0001] The invention relates to the technical field of electronic circuits, in particular to a wireless radio frequency transmitter. 【Background technique】 [0002] With the development of communication technology, more and more information is transmitted within the same bandwidth, and the requirements for wireless receivers / transmitters are correspondingly more and more complex. A general local oscillator generating circuit of a traditional transmitter structure includes a radio frequency voltage controlled oscillator (RFVoltage Controlled Oscillators, VCO for short), a radio frequency phase locked loop (RF PLL), a local oscillator circuit and a local oscillator buffer circuit. Since the integral multiple harmonics of the local oscillator clock signal have the same frequency as the oscillation signal output by the VCO, it will cause traction to it and destroy its phase noise. [0003] Therefore, it is necessary to provide a new technical solution to solve...
Claims
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IPC IPC(8): H04B1/04
CPCH04B1/04H04B1/0475H04B2001/0408H04B2001/0491
Inventor 吴悦
Owner NANJING ZGMICRO CO LTD