Four-channel noise thermometer with quantum voltage as reference
A four-channel, thermometer technology, applied to thermometers, thermometers with directly heat-sensitive electric/magnetic elements, measuring devices, etc., can solve the problem of inability to match power and impedance at the same time, limit the measurement level of the measurement circuit, and prolong the statistical average time Measuring time etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0019] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0020] The schematic diagram of the four-channel noise thermometer shown in Figure 1 includes a noise source 10 to be measured, a reference quantum voltage pseudo-noise source 11, a switching circuit 12, a four-way amplification filter circuit 13, and a data acquisition and processing part 14. Among them, in the amplification and filtering circuit 13, Preamp represents a preamplification circuit, Buffer1 is a first-stage buffer circuit, and Buffer2 is a second-stage buffer circuit, and each amplification and filtering circuit uses a passive low-pass filter 1 and a filter 2 , preferably both filters are 11th-order Butterworth low-pass filters, and the cut-off frequency of each filter is 800kHz. Two high-order low-pass filters can quickly attenuate the high-frequency signal aliased by the ADC, and ensure that the aliased signal is at least 120dB lower than...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com