A kind of anti-radiation dds circuit

An anti-radiation and circuit technology, applied in the direction of electrical components, automatic power control, etc., can solve problems such as the wrong use of the subsequent DAC, the phase shift of the output digital signal, etc., and achieve the effect of simplifying the circuit configuration and difficulty of use

Active Publication Date: 2022-08-02
58TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-irradiation DDS circuit to solve the problem that the traditional DDS is easily affected by the SET effect to produce a phase shift of the output digital signal, which leads to the wrong use of the subsequent DAC

Method used

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  • A kind of anti-radiation dds circuit
  • A kind of anti-radiation dds circuit
  • A kind of anti-radiation dds circuit

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Embodiment 1

[0027] The invention provides an anti-radiation DDS circuit, the structure of which is as follows: figure 1 As shown, including a DDS core, input digital core clock Core_clk into the DDS core, the DDS core generates interleaved digital sinusoidal signals data1 and data2 to the digital data transmission module; the digital data transmission module delivers the digital sinusoidal signals data1 and data2 data2 is sent to the analog receiving stage and the DAC module; the analog receiving stage is also input with an analog receiving clock Sysclk / 2, and the DAC module is also input with a system clock Sysclk; the DAC module generates an analog output signal Analog_out. Preferably, the anti-radiation DDS circuit further includes a dynamic correction circuit, the digital data transmission module generates a data clock dco to the dynamic correction circuit, and the output end of the dynamic correction circuit generates a selection signal Delay_select to the clock delay module, In addi...

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Abstract

The invention discloses an anti-radiation DDS circuit, which belongs to the technical field of integrated circuits. The anti-radiation DDS circuit includes a DDS core for generating interleaved digital sinusoidal signals date1 and date2; a digital data sending module for delivering digital sinusoidal signals date1 and date2 to an analog receiving stage and a DAC module; a dynamic correction circuit, the digital The data transmission module generates a data clock dco to the dynamic correction circuit, the output terminal of the dynamic correction circuit generates a selection signal to the clock delay module, and the dynamic correction circuit, the digital data transmission module and the clock delay module form a negative feedback loop. By introducing a negative feedback loop, the invention can correct the phase offset error caused by the SET effect on-line without updating the configuration signal, simplify the circuit configuration and the difficulty of use in irradiation application, and can be widely used in anti-irradiation DDS or related large-scale digital-analog hybrid circuits.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to an anti-radiation DDS circuit. Background technique [0002] DDS (Direct Digital Synthesizer, direct digital frequency synthesizer) is a device that adopts all-digital frequency and phase waveform synthesis technology. Because of its direct processor control, high-speed programmable configuration, precise frequency hopping and fine-tuning, and good stability, it is widely used in radar, broadband communication, and measurement and control fields. It has a large demand for use in the aerospace field. [0003] Due to the SET effect of high-energy protons and neutrons in the space radiation environment, various soft errors of the device will be caused. For DDS, the SET effect will affect the clock or configuration signal and cause a phase shift of the output digital signal, resulting in a sampling error of the post-stage DAC. ; Due to the fast working rate, the traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/085
CPCH03L7/085
Inventor 张涛苏小波范晓捷卓琳
Owner 58TH RES INST OF CETC
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