IEEE

Accurate Noise Source Separation in Pulse-Frequency Modulation-Controlled Power Converters Using Asynchronous Near-Field and Far-Field Measurement Analysis

Abstract: Aperiodic spike noise signals generated by pulse-frequency modulation (PFM)-controlled direct-current (DC)–DC converters introduce random jitter into the switching timing, rendering it ...
Scientific Research Publishing

Bailon, R., et al. (2011) The Integral Pulse Frequency Modulation Model with Time-Varying Threshold: Application to Heart Rate Variability Analysis during Exercise Stress ...

ABSTRACT: This research is performed based on the modeling of biological signals. We can produce Heart Rate (HR) and Heart Rate Variability (HRV) signals synthetically using the mathematical ...
Frontiers

Novel non-resonant, low-frequency pulse–current circuit for energy-efficient, low-noise transcranial magnetic stimulation

Introduction: Transcranial magnetic stimulation (TMS) is increasingly used for non-invasive neuronal activation. By harnessing a pulsed magnetic field, TMS induces electric currents that target the ...
EDN

Pulse Modulation and Noise Figure Measurements

With its R&S ZVA high end vector network analyzers and R&S ZVAX-TRM extension unit, Rohde & Schwarz offers an efficient and highly flexible solution for characterizing active components. Using a ...
Scientific Research Publishing

Seydnejad, S.R., et al. (2001) Time-Varying Threshold Integral Pulse Frequency Modulation. Biomedical Engineering Transactions, 48, 949-962.

ABSTRACT: This research is performed based on the modeling of biological signals. We can produce Heart Rate (HR) and Heart Rate Variability (HRV) signals synthetically using the mathematical ...
EDN

Pulse Frequency Modulator

The pulse width of the compact pulse cum frequency modulator can be varied by altering the change-over point of comparator IC1 with a control voltage via resistor R1. The hysteresis of the IC is ...