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Ultralow-noise micro-volt adjusting device

An adjustment device and ultra-low noise technology, applied in the direction of impedance network, electrical components, multi-terminal pair network, etc., can solve the problem of low signal-to-noise output signal, improve the output signal-to-noise ratio, suppress the influence of flicker noise, and realize precision output effect

Pending Publication Date: 2020-06-05
长沙天恒测控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an ultra-low noise microvolt regulating device to solve the problem of low signal-to-noise ratio of the output signal of the existing microvolt regulating source

Method used

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  • Ultralow-noise micro-volt adjusting device
  • Ultralow-noise micro-volt adjusting device

Examples

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Embodiment Construction

[0049] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0050] like figure 1 As shown, an ultra-low noise microvolt regulator, including:

[0051] AC voltage signal output module 1, used to output AC voltage signals exceeding the 1 / f noise range;

[0052] A passive attenuation module 2, configured to attenuate the AC voltage signal into an AC sinusoidal signal at the microvolt level;

[0053] A half-wave rectification module 3, configured to rectify the AC sinusoidal signal at the microvolt level into a half-wave signal;

[0054] The filter module 4 is used to filter the rectified half-wave signal and convert it into a microvolt DC signal for output.

[0055]In this embodiment, the output noise caused by the corresponding active device (operati...

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Abstract

The invention discloses an ultra-low noise micro-volt adjusting device, which comprises an alternating voltage signal output module for outputting an alternating current voltage signal beyond a 1 / f noise range, a passive attenuation module for attenuating the alternating current voltage signal into a microvolt-level alternating-current sinusoidal signal, a half-wave rectification module for rectifying the microvolt-level alternating current sinusoidal signal into a half-wave signal, and a filtering module for filtering and converting the rectified half-wave signal into a micro-volt direct-current signal and outputting the micro-volt direct-current signal. According to the ultra-low noise micro-volt adjusting device, the output signal-to-noise ratio of the micro-volt adjusting source is greatly improved through baseband signal adjustment and passive attenuation, so that the stability and accuracy of the micro-volt adjusting source for outputting small signal voltage are improved, and the precise output of the micro-volt small signal voltage source is achieved.

Description

technical field [0001] The invention relates to the field of signal voltage control, in particular to an ultra-low noise microvolt adjustment device. Background technique [0002] The output of the existing microvolt adjustment source is often directly output by the operational amplifier, that is, the adjustable DC signal is output through the DA digital-to-analog converter, and then the precision operational amplifier is used to reduce the output by a certain multiple. For the DA digital-to-analog converter itself As far as the noise of the output voltage signal is concerned, because the subsequent operational amplifier attenuates the overall signal, the noise of the output voltage signal of the DA digital-to-analog converter is negligible for the output voltage of the operational amplifier, such as Figure 12 shown. However, since the operational amplifier is an active device, it has a corresponding output noise, and the output noise of the operational amplifier is in the ...

Claims

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Application Information

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IPC IPC(8): H03H7/01H03H11/04
CPCH03H7/01H03H11/04Y02B70/10
Inventor 周新华曹威
Owner 长沙天恒测控技术有限公司
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