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Negative impedance converter

About: Negative impedance converter is a research topic. Over the lifetime, 5801 publications have been published within this topic receiving 87636 citations.


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Patent
20 Feb 2014
TL;DR: In this article, the authors describe a non-dissipative snubber circuit that can be configured to boost a voltage applied to a load after the load's impedance rises rapidly.
Abstract: This disclosure describes a non-dissipative snubber circuit configured to boost a voltage applied to a load after the load's impedance rises rapidly. The voltage boost can thereby cause more rapid current ramping after a decrease in power delivery to the load which results from the load impedance rise. In particular, the snubber can comprise a combination of a unidirectional switch, a voltage multiplier, and a current limiter. In some cases, these components can be a diode, voltage doubler, and an inductor, respectively.

26 citations

Patent
16 Jan 2002
TL;DR: In this article, the analog-to-analog converter is configured to produce an offset measurement in response to the intermediate voltage and the measurement voltage, which reduces the dynamic range requirements of ADC such that substantially a full input range of the ADC is utilized.
Abstract: A converter system for a temperature sensor includes a programmable current source, a digital-to-analog converter, a summer, and an analog-to-digital converter. The temperature sensor provides a measurement voltage in response to application of a bias current. The programmable current source selectively provides two different currents to the temperature sensor such that the temperature sensor provides two measurement voltages during a given temperature measurement. The digital-to-analog converter (DAC) provides an intermediate voltage that corresponds to an approximation of a voltage between the two voltages. A summer is configured to produce an offset measurement in response to the intermediate voltage and the measurement voltage. The analog-to-digital converter (ADC) receives the offset measurement voltage and produces a conversion code. Offsetting the measurement voltage reduces the dynamic range requirements of the ADC such that substantially a full input range of the ADC is utilized.

26 citations

Patent
14 Oct 2003
TL;DR: In this paper, the power conversion is split into two or more stages, and a feed-forward signal is generated by one of the stages and sent to another stage prior thereto.
Abstract: In a method for a DC-DC power conversion performed by a switching mode buck voltage converter, the power conversion is split into two or more stages, and a feed-forward signal is generated by one of the stages and sent to another stage prior thereto. The feed-forward signal is generated by responding to a load current transient, such as output voltage drop, ON-duty increment or decrement occurred in the PWM control loop, error amp output swinging, and any other detectable signals in response to load current transient of the voltage converter. As a result, the performance of the DC-DC voltage converter is improved due to the prior stage modulated early in time, and both lower ripple current and peak current in steady state operations and fast response to load current transient conditions could be simultaneously obtained.

26 citations

Patent
15 May 2014
TL;DR: In this paper, an apparatus, method, and system for measuring current within a converter is described. And the converter also includes a resonant current calculation module for computing a tank current value based on the voltage.
Abstract: An apparatus, method, and system for measuring current within a converter. The converter including a resonant tank circuit with a capacitor, the resonant tank circuit is coupled to a DC input bridge and a first terminal of the capacitor is coupled to a ground of the DC input bridge. In addition, a voltage monitor coupled across the capacitor for measuring a voltage across the capacitor. The converter also includes a resonant current calculation module for computing a tank current value based on the voltage.

26 citations

Patent
30 Oct 1998
TL;DR: In this paper, a split-boost converter with a main inductor, first and second main switches and floating and fixed outputs is presented. And the converter is operable in a first mode, when an input voltage of the converter at least equals an output voltage of a fixed output, in which the auxiliary switch remains open and the first main switches are modulated to operate the converter.
Abstract: A split-boost converter having a main inductor, first and second main switches and floating and fixed outputs and a method of operating the same. In one embodiment, the converter includes an auxiliary diode coupled between the main inductor and a first rail of the floating output, and an auxiliary switch coupled to a node between the main inductor and the auxiliary diode and a second rail of the floating output. The converter is operable in a first mode, when an input voltage of the converter at least equals an output voltage of the converter, in which the auxiliary switch remains open and the first and second main switches are modulated to operate the converter. The converter is further operable in a second mode, when an input voltage of the converter is less than an output voltage of the converter, in which the first and second main switches remain closed and the auxiliary switch is modulated to operate the converter.

26 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202330
2022104
2021120
2020131
2019134
2018155