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Phase modulation circuit based on delta-sigma

A phase modulation and circuit technology, applied in automatic power control, electrical components, mode conversion, etc., can solve the problems of large power consumption, area, occupation, etc., achieve high phase adjustment accuracy, reduce circuit scale and overall power consumption Effect

Pending Publication Date: 2020-06-12
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Especially in the active phased array system, each channel will have a phase shifter, which occupies a large power consumption and area

Method used

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  • Phase modulation circuit based on delta-sigma
  • Phase modulation circuit based on delta-sigma
  • Phase modulation circuit based on delta-sigma

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Embodiment Construction

[0021] In order to make the purpose of the present invention, technical solutions and application superiority clearer, the following in conjunction with the appended Figure 1-5 The specific implementation manner of the present invention will be described in further detail.

[0022] figure 1 It is a schematic diagram of the application structure of the phase shifter in the traditional RF channel. The RF differential signal is input into the low noise amplifier, the output signal of the low noise amplifier and the signal output by the frequency synthesizer are mixed, and the phase shifter has the phase of the mixer output frequency Make adjustments.

[0023] figure 2 It is a structural schematic diagram based on the application of frequency synthesizer with phase shift function in the radio frequency channel. According to the basic principle of signal mixing, It is also possible to perform phase shift before mixing, and set the RF output signal to Acosω 1 t, the carrier s...

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Abstract

The invention discloses a delta-sigma-based phase modulation circuit, belongs to a microcircuit structure in the field of integrated circuits, and relates to a circuit for realizing phase adjustment in a frequency synthesizer. A delta-sigma modulator of a traditional mash1-1-1 architecture is improved, a phase control module is added on the basis of the delta-sigma modulator, the phase of the output frequency can be programmed, and the phase change can be obtained. The phase shifter can replace the function of a phase shifter after frequency mixing, phase adjustment is achieved before frequency mixing by adjusting the phase of the local oscillator frequency, and therefore the circuit scale and the overall power consumption are greatly reduced, and the phase shifter has great significance in frequency phase shifting and beam forming of a radio frequency receiving and transmitting channel.

Description

technical field [0001] The invention belongs to a microcircuit structure in the field of integrated circuits, and relates to a frequency synthesizer used to realize fractional frequency division modulation, phase adjustment and resynchronization functions. Background technique [0002] With the continuous development of radio frequency communication systems, the frequency bands of received and transmitted signals are getting wider and wider, and the requirements for signal quality are getting higher and higher, and the local oscillator circuit is a component of radio frequency transceiver circuit equipment, which plays a role The conversion of high-frequency signals to baseband signals, or the conversion of baseband signals to high-frequency signals, the design of low-noise frequency synthesizers has become a current hot research direction. [0003] In practical applications, RF transceiver channels are used in conjunction with frequency synthesizers, and some use one channe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00H03L7/081H03L7/087
CPCH03L7/081H03L7/087H03M3/436
Inventor 曲明廖春连杨格亮王旭东范鹏飞
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP