High-precision broadband quadrature demodulator
A quadrature demodulator, high-precision technology, applied in demodulation, angular modulation oscillation demodulation, modulation transfer and other directions, can solve the problem that high-performance quadrature demodulator circuit cannot be guaranteed
Pending Publication Date: 2022-02-25
58TH RES INST OF CETC
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Problems solved by technology
The traditional structure can no longer guarantee the realization of high-performance quadrature demodulator circuit
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[0032] A high-precision broadband quadrature demodulator proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.
[0033] The invention provides a high-precision broadband quadrature demodulator, its structure is as follows figure 1 As shown, it includes a divide-by-two module, a mixer module, a launch-follower module and a reference module, which can demodulate signals with an input bandwidth of 30MHz~2GHz. The two frequency division module performs two frequency division output on the local oscillator input signal; the mixer module mixes the output signal of the ...
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The invention discloses a high-precision broadband quadrature demodulator, which belongs to the field of integrated circuit signal processing, comprises a frequency-halving module, a frequency mixer module, an emitter follower module and a reference module, and can demodulate signals with the input bandwidth of 30MHz-2GHz. The two-frequency-halving module performs two-frequency-halving output on the local oscillator input signal. The frequency mixer module performs frequency mixing output on the output signal and a radio frequency input signal of the frequency-halving module. The emitter follower module performs level shift on the output signal of the frequency mixer module and outputs the output signal after increasing the driving capability, and the output signal is four paths of pairwise orthogonal signals. The reference module provides reference current for the three modules. The high-precision broadband quadrature demodulator is suitable for the design of the high-performance quadrature demodulator with the radio frequency input frequency of 30 MHz to 2 GHz, and compromise among broadband, high precision, low power consumption and low chip area performance can be achieved based on an existing mature SiGe process platform.
Description
technical field [0001] The invention relates to the technical field of integrated circuit signal processing, in particular to a high-precision broadband quadrature demodulator. Background technique [0002] As science and technology become more and more mature, modern communication systems have achieved various technological leaps, from the original analog modulation signal communication, narrowband voice communication, and wired transmission communication to digital modulation signal communication, broadband integrated service communication, and wireless mobile communication. With the leap of communication, electronic communication systems are becoming more and more abundant. Communication systems continue to develop towards large capacity and high speed, and the requirements for radio frequency communication technology are more critical; radio frequency signals are extended to higher frequencies and wider ranges. [0003] The realization of the wireless communication syst...
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Login to View More IPC IPC(8): H03D7/14H03D3/00
CPCH03D7/1433H03D3/00Y02D30/70
Inventor 刘雪莲吴舒桐蒋颖丹苏龙张沁枫尤飞龙孙新宇
Owner 58TH RES INST OF CETC