Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Instrumentation Amplifier

Instrumentation Amplifier

An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...

Operational Amplifiers

Operational Amplifiers

The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...

MOSFET Amplifiers

MOSFET Amplifiers

The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...

BJT Amplifiers

BJT Amplifiers

Bipolar Junction Transistors (BJTs) are pivotal components in amplifier circuits, functioning as voltage-controlled current sources in their active region. This characteristic allows them to efficiently control the collector current through variations in the base-emitter voltage. Essentially, BJTs amplify power due to their ability to take a weak input signal and output a much stronger signal.
In BJT amplifier configurations, particularly in common-emitter setups, the transistor's role...

Instrument Calibration

Instrument Calibration

Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...

Instrument Transformers

Instrument Transformers

Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...

You might also read

Related Articles

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

Sort by

Same author

Design of a tube lens with a focus tunable lens for optical inspection systems.

Scientific reports·2026

Same author

Development of an Integrated Gamma-Ultrasound (γ -US) Probe Detector and Multiplexed Readout for Simultaneous γ -US Detection.

IEEE transactions on ultrasonics, ferroelectrics, and frequency control·2025

Same author

Novel Optical Design of Large Aperture Supported Standard Wide Zoom Lens.

Sensors (Basel, Switzerland)·2025

Same author

Novel stability approach using Routh-Hurwitz criterion for brain computer interface applications.

Technology and health care : official journal of the European Society for Engineering and Medicine·2024

Same author

Design of Preamplifier for Ultrasound Transducers.

Sensors (Basel, Switzerland)·2024

Same author

Power Amplifier Design for Ultrasound Applications.

Micromachines·2023

Search research articles

Related Experiment Video

Updated: Jan 28, 2026

Field Identification of Matricaria chamomilla using a Portable qPCR System

Field Identification of Matricaria chamomilla using a Portable qPCR System

Published on: October 10, 2020

Class-C Linearized Amplifier for Portable Ultrasound Instruments.

¹Department of Medical IT Convergence Engineering and Kumoh National Institute of Technology, Gumi 39253, Korea. hojongch@kumoh.ac.kr.

Sensors (Basel, Switzerland)

|February 24, 2019

Summary

A new transistor linearizer network boosts class-C amplifier output, enhancing ultrasound echo signal sensitivity. This innovation improves portable ultrasound device performance and battery life by optimizing power consumption.

Keywords:

class-C amplifier portable ultrasound instruments transistor linearizer

More Related Videos

Sonodynamic Therapy for the Treatment of Glioblastoma Multiforme in a Mouse Model Using a Portable Benchtop Focused Ultrasound System

Sonodynamic Therapy for the Treatment of Glioblastoma Multiforme in a Mouse Model Using a Portable Benchtop Focused Ultrasound System

Published on: February 10, 2023

An Instrumented Pull Test to Characterize Postural Responses

An Instrumented Pull Test to Characterize Postural Responses

Published on: April 6, 2019

Related Experiment Videos

Last Updated: Jan 28, 2026

Field Identification of Matricaria chamomilla using a Portable qPCR System

Field Identification of Matricaria chamomilla using a Portable qPCR System

Published on: October 10, 2020

Sonodynamic Therapy for the Treatment of Glioblastoma Multiforme in a Mouse Model Using a Portable Benchtop Focused Ultrasound System

Sonodynamic Therapy for the Treatment of Glioblastoma Multiforme in a Mouse Model Using a Portable Benchtop Focused Ultrasound System

Published on: February 10, 2023

An Instrumented Pull Test to Characterize Postural Responses

An Instrumented Pull Test to Characterize Postural Responses

Published on: April 6, 2019

Area of Science:

Electrical Engineering
Biomedical Engineering
Acoustics

Background:

Class-C amplifiers offer high efficiency and reduced power consumption for portable ultrasound instruments.
However, their lower output voltage amplitudes can compromise echo signal sensitivity and overall instrument performance.
Piezoelectric transducers are crucial components in ultrasound devices, requiring sensitive echo signal detection.

Purpose of the Study:

To develop a transistor linearizer network for class-C amplifiers.
To enhance the transmitted output voltage amplitudes of class-C amplifiers.
To improve the sensitivity of echo signals in portable ultrasound instruments.

Main Methods:

Proposed transistor linearizer networks to modify class-C amplifier output.
Implemented and tested a class-C linearized amplifier.
Evaluated performance using pulse-echo responses with focused piezoelectric transducers.

Main Results:

The class-C linearized amplifier achieved a significantly improved echo signal amplitude of 1.29 Vp-p.
This represents a substantial increase compared to the 0.56 Vp-p amplitude from a class-C amplifier alone.
Demonstrated enhanced sensitivity in echo signal detection.

Conclusions:

The developed class-C linearized amplifier effectively increases echo signal sensitivity.
This technology offers a potential solution for improving portable ultrasound instrument performance.
The approach balances high efficiency with enhanced signal detection capabilities.