Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Frequency downconversion and phase noise in MIT.

S Watson1, R J Williams, H Griffiths

  • 1School of Electronics. University of Glamorgan, Pontypridd, UK. swatson1@glam.ac.uk

Physiological Measurement
|March 6, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Influence of geometry, reinforcement, and sterilisation on the dimensional accuracy of additively manufactured carbon fibre-reinforced nylon composites.

Scientific reports·2025
Same author

Systematic review: occupational sedentary behaviour and common mental health symptoms.

Occupational medicine (Oxford, England)·2025
Same author

Renal function and iodinated contrast media: a National Institute for Health and Care Excellence update.

Clinical radiology·2025
Same author

Canadian Surgery Forum: Abstracts of presentations to the Annual Meetings of the Canadian Association of Bariatric Physicians and Surgeons, Canadian Association of General Surgeons, Canadian Association of Thoracic Surgeons, Canadian Hepato-Pancreato-Biliary Association, Canadian Society of Surgical Oncology, Canadian Society of Colon and Rectal Surgeons, Vancouver, BC, Sept. 17-21, 2013.

Canadian journal of surgery. Journal canadien de chirurgie·2025
Same author

Type 1 Diabetes in care homes: A practical guide on management.

Diabetic medicine : a journal of the British Diabetic Association·2024
Same author

Response to letter to the editor: Lost in Transition.

Journal of pediatric urology·2024
Same journal

Continuous tracking of aortic aneurysm diameter with peripheral pulse waves: a computational framework combining sequential Markov chain Monte Carlo with Kalman filtering.

Physiological measurement·2026
Same journal

The 2026 global roadmap for textile-integrated wearable technologies in health.

Physiological measurement·2026
Same journal

Augmenting single-lead ECG interpretation through QRS waveform decomposition and rotation.

Physiological measurement·2026
Same journal

Dynamic Beat-to-Beat Blood Pressure Estimation using a Multi-modal Wearable Deep Learning Approach.

Physiological measurement·2026
Same journal

Dual warm-start fusion versus attention-based fusion in low-label ECG-PCG classification: a controlled ablation study.

Physiological measurement·2026
Same journal

Inter-patient multi-label ECG classification via low-rank adaptation fine-tuned large language models with dynamic graph convolutional network.

Physiological measurement·2026
See all related articles

Heterodyne downconversion enables precise phase measurement in high-frequency (HF) MIT systems by translating signals to lower frequencies. This method maintains signal integrity and simplifies measurements, crucial for advanced HF applications.

Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Electromagnetics

Background:

  • High-frequency (3-30 MHz) operation in MIT systems yields larger signal amplitudes.
  • Signal distribution at HF poses challenges in isolation and phase stability.
  • Heterodyne downconversion offers a solution for signal translation to lower frequencies, preserving amplitude and phase information.

Purpose of the Study:

  • To present measurements of a direct phase measurement system using heterodyne downconversion.
  • To compare the performance of three different circuit configurations for this application.
  • To evaluate the precision and amplitude-dependent phase variations in the system.

Main Methods:

  • Implementation of a direct phase measurement system utilizing heterodyne downconversion.

Related Experiment Videos

  • Testing of three distinct circuit configurations for signal reception in MIT systems.
  • Measurement of phase precision and offset across a range of input amplitudes (-21 dBV to -72 dBV).

    • Main Results:

    • A circuit achieved 100-sample average precision of 0.008 degrees at -21 dBV input amplitude.
    • Phase offset varied by 1.8 degrees as input amplitude decreased from -21 dBV to -72 dBV.
    • Precision remained below 0.022 degrees down to -60 dBV input amplitude, despite deterioration at lower amplitudes.

    Conclusions:

    • Heterodyne downconversion is effective for precise phase measurement in HF MIT systems.
    • The tested circuit configurations offer varying performance, with one suitable for receiver applications.
    • Understanding amplitude-dependent phase variations and phase noise is critical for system optimization.