Topic
Pulse-frequency modulation
About: Pulse-frequency modulation is a research topic. Over the lifetime, 4151 publications have been published within this topic receiving 53039 citations. The topic is also known as: PFM.
Papers published on a yearly basis
Papers
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TL;DR: This brief presents a low-power forward and reverse body bias generator with body bias (BB) switches to dynamically set BB voltage to achieve low power consumption in a wide load current range of 1–30.
Abstract: This brief presents a low-power forward and reverse body bias (FRBB) generator with body bias (BB) switches to dynamically set BB voltage. The reverse BB (RBB) P-well generator uses pulse frequency modulation (PFM)-based switching capacitor power converter to achieve low power consumption in a wide load current range of 1–30 $\mu ~\text{A}$ . The FBB adopts class-AB output stage and an over-current indicator to detect large body diode forward conduction leakage current. BB switch is introduced to dynamically configure the FRBB generated voltage. The proposed FRBB with BB switch is fabricated in a CMOS 40-nm triple well process, occupying an area of around 0.1 mm2. The 300k digital gates are used as the load for test. The measured active current for FBB and RBB are 13 and $5~\mu \text{A}$ , respectively.
15 citations
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23 Mar 1988
TL;DR: In this article, the impact of modulation parameters on signal performance of fiber gyroscopes has been investigated and compared to experimental test results, including bias drift, phase modulation index and scaling problems.
Abstract: The impact of modulation parameters on signal performance of fiber gyroscopes has been investigated. Amplitude modulation (a.m.) causing bias drift and instabilities of phase modulation index causing scaling problems will be discussed and compared to experimental test results.
15 citations
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TL;DR: This experiment provided a further test of the hypothesis that the effectiveness of the temporal mechanism depends upon the time spent close to frequency extremes during the modulation cycle, and results are consistent with the idea that detection of FM of a 1-kHz carrier is partly mediated by a sluggish temporal mechanism.
Abstract: It has been proposed that the detection of frequency modulation (FM) of sinusoidal carriers can be mediated by two mechanisms; a place mechanism based on FM-induced amplitude modulation (AM) in the excitation pattern, and a temporal mechanism based on phase locking in the auditory nerve. The temporal mechanism appears to be “sluggish” and does not play a role for FM rates above about 10 Hz. It also does not play a role for high carrier frequencies (above about 5 kHz). This experiment provided a further test of the hypothesis that the effectiveness of the temporal mechanism depends upon the time spent close to frequency extremes during the modulation cycle. Psychometric functions for the detection of AM and FM were measured for two carrier frequencies, 1 and 6 kHz. The modulation waveform was quasitrapezoidal. Within each modulation period, P, a time TSS was spent at each extreme of frequency or amplitude. The transitions between the extremes, with duration Ttrans had the form of a half-cycle of a cosine f...
15 citations
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29 Dec 1961
15 citations
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21 Mar 2002TL;DR: In this paper, a digital-to-analog converter including a signal generator, a low-weighted value manager, and a voltage smoothing circuit is used to generate a first pulsewidth-modulated signal having first pulses having first pulse width in response to a value of the upper nh bits of the n-bit digital data.
Abstract: A digital-to-analog converter including a signal generator, a low-weighted value manager, and a voltage smoothing circuit. The signal generator performs a pulse width modulation (pwm) based on a reference clock signal and upper nh bits of the n-bit digital data to generate a first pulse-width-modulated signal having first pulses having a first pulse width in response to a value of the upper nh bits of the n-bit digital data and a pwm cycle signal. The low-weighted value manager divides a pulse width in response to a value of the lower nl bits of the n-bit digital data into fraction pulse widths, respectively adds the fraction pulse widths to the first pulses, and generates a second pulse-width-modulated signal having second pulses including the first pulse width and one of the fraction pulse widths.
15 citations