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Related Concept Videos

Clipper Circuit01:18

Clipper Circuit

522
A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
522
Maximum Power Transfer01:16

Maximum Power Transfer

335
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
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Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
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Characteristics of Series Resonant Circuit01:24

Characteristics of Series Resonant Circuit

298
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
298
Parallel Resonance01:23

Parallel Resonance

253
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
253
The Power Superposition Principle01:19

The Power Superposition Principle

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Consider a circuit with two sinusoidal voltage sources. Each one influences the circuit independently, and the superposition principle helps us understand the combined effect by adding up the responses from each source.
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A 21.3%-Efficiency Clipped-Sinusoid UWB Impulse Radio Transmitter With Simultaneous Inductive Powering and Data

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    |November 29, 2022
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    Summary

    This study presents an ultra-wide-band impulse-radio transmitter for low-energy biomedical applications, achieving high power efficiency and data rates. The novel design enables efficient wireless communication for microsystems.

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    Area of Science:

    • Electrical Engineering
    • Biomedical Engineering
    • Wireless Communication

    Background:

    • Biomedical microsystems require efficient wireless communication for low-energy operation.
    • Existing ultra-wide-band impulse-radio (UWB-IR) technologies face challenges in power efficiency and data rate.

    Purpose of the Study:

    • To develop a high power efficiency UWB-IR transmitter (TX) for low-energy biomedical microsystems.
    • To achieve a high data-rate wireless link within the 3-5 GHz band for biomedical applications.

    Main Methods:

    • Modulating an LC tank in steady-state resonance for high power efficiency.
    • Implementing a novel clipped-sinusoid scheme for on-off keying (OOK) modulation using a voltage clipper circuit.
    • Fabricating the TX in 130 nm CMOS technology and characterizing its performance.

    Main Results:

    • Achieved state-of-the-art power efficiency of 21.3% at 230 Mbps data rate.
    • Demonstrated low energy consumption of 21pJ/b.
    • Measured a bit-error-rate (BER) < 10-6 at 1 m without pulse averaging.
    • Supported simultaneous wireless powering and VCO-based data transmission.

    Conclusions:

    • The developed UWB-IR TX offers a promising solution for efficient wireless communication in low-energy biomedical microsystems.
    • The novel modulation scheme and design contribute to significant improvements in power efficiency and data rate.
    • Future work may explore VCO-free modes for further power reduction.