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Frequency complex for fast locking phaselocked loop

A technology of frequency synthesis and fast locking, applied in the direction of automatic power control, electrical components, etc., can solve problems such as troublesome use, and achieve the effects of automatic correction, convenient application, and automatic compensation of process deviations

Active Publication Date: 2010-06-16
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the frequency synthesis device needs to be calibrated every time it is powered on, which brings troubles in use

Method used

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  • Frequency complex for fast locking phaselocked loop
  • Frequency complex for fast locking phaselocked loop
  • Frequency complex for fast locking phaselocked loop

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] Such as figure 1 as shown, figure 1 The block diagram of the fast locked phase-locked loop frequency synthesis device provided by the present invention, this frequency synthesis device includes: mixed signal voltage controlled oscillator 10, dual-mode preset frequency divider 11, digital processor 12, nonvolatile memory 13 , frequency and phase detector 14, charge pump 15 and loop filter 16.

[0032] Among them, the mixed-signal voltage-controlled oscillator 10 is used to generate a periodic oscillating signal, receives a preset signal from the digital processor 12, and completes the direct preset of the target frequency; the dual-mode preset frequency divider 11 is used to control the mixed-signal voltage The os...

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Abstract

The invention discloses a frequency complex for fast locking phaselocked loop. The frequency complex comprises a mixed signal voltage-controlled oscillator, a bimodule preset frequency divider, a digital processing unit, a nonvolatile memory, a phase-frequency detector, a charge pump and a loop filter. By using the invention, the processing of correcting the phaselocked loop in every charging can be avoided, the presetting on the output frequency of the mixed signal voltage-controlled oscillator can be carried out precisely with small difference between the preset frequency and the target frequency under process variation, and the phaselocked loop can finish locking in an extremely short time. In addition, the modules comprising the nonvolatile memory can be manufactured by standard CMOS process and conveniently applied in fast frequency hopping communication systems.

Description

technical field [0001] The invention relates to the technical field of frequency synthesis in communication and information processing devices, in particular to a fast-locked phase-locked loop frequency synthesis device. Background technique [0002] The frequency synthesis device is a high-stability and high-precision frequency generating device, which is widely used in various fields of radio such as modern communication, radar, electronic countermeasures and modern instrumentation. [0003] In time division multiple access communication system and fast frequency hopping spread spectrum communication system, fast switching between communication channels is required, and the switching between communication channels is completed by a frequency synthesis device. The locking speed of the frequency synthesis device directly determines the switching speed between communication channels, so the frequency synthesis device that realizes fast locking is a key technology. [0004] I...

Claims

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Application Information

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IPC IPC(8): H03L7/08H03L7/18H03L7/099H03L7/093
Inventor 耿志卿吴南健颜小舟冯鹏楼文峰
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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