Topic
Isolation amplifier
About: Isolation amplifier is a research topic. Over the lifetime, 758 publications have been published within this topic receiving 7645 citations.
Papers published on a yearly basis
1 / 2
Papers
Patent•
24 Jun 2003TL;DR: In this article, an amplifier system switches between modes of operation based upon a characteristic of an input signal relative to a first threshold level and a second threshold level, and a mode selector selects the operation mode by transmitting an amplitude modulated signal plus a variable headroom voltage to a supply terminal of a power amplifier during the envelope tracking mode, an amplitude and phase modulated input signal during the polar mode and a substantially constant amplitude signal to the supply terminal during the linear mode.
Abstract: An amplifier system is provided that switches between a linear mode of operation, an envelope tracking mode of operation and a polar mode of operation. The amplifier system switches between modes of operation based upon a characteristic of an input signal relative to a first threshold level and a second threshold level. A mode selector selects the operation mode by transmitting an amplitude modulated signal plus a variable headroom voltage to a supply terminal of a power amplifier during the envelope tracking mode, an amplitude modulated signal to the supply terminal and phase modulated input signal during the polar mode and a substantially constant amplitude signal to the supply terminal during the linear mode.
239 citations
Patent•
3 Dec 1993
TL;DR: In this paper, a method and apparatus for communicating a modulated signal across an isolation barrier using capacitors is provided. But this method requires the use of a large and bulky isolation transformer.
Abstract: A method and apparatus for communicating a modulated signal across an isolation barrier using capacitors is provided. The present invention allows low distortion communication of an audio signal across an isolation barrier without the need for a large and bulky isolation transformer. The present invention may be used to provide telephone line isolation for modem applications compliant with governmental regulations. A line interface integrated circuit (IC) may be connected directly to a telephone line and powered by the telephone line. The line interface IC may include a sigma delta modulator to communicate the receive signal across a capacitor over an isolation barrier and a digital-to-analog (D/A) converter to provide an analog transmit signal from a sigma delta bit stream communicated across a capacitor over an isolation barrier. Circuitry on the opposite side of the isolation barrier includes similar components to process the transmit and receive signals.
144 citations
Patent•
20 Aug 1993TL;DR: An isolated amplifier as discussed by the authors is a biomedical amplifier with inputs for receiving signals, a circuit for sensing a common mode voltage received by the inputs from the electrodes, and a capacitance to chassis ground for receiving a voltage representative of the compensation voltage.
Abstract: An isolated amplifier, typically a biomedical amplifier, includes a main amplifier having inputs for receiving signals, a circuit for sensing a common mode voltage received by the inputs from the electrodes and providing a compensation voltage representative of the common mode voltage, and a capacitance to chassis ground for receiving a voltage representative of the compensation voltage. The circuit and the capacitance cause the amplifier power supply voltages to track the common mode voltage. The capacitance permits the feedback loop gain to be increased, thereby reducing common mode voltage errors.
137 citations
1 Feb 2008
TL;DR: This work uses on-chip transformers for a 60GHz PA as an integrated CMOS solution that achieves a ldB compressed output power and saturated power of +9dBm and +12.3dBm, respectively.
Abstract: We demonstrate a fully integrated 60GHz transformer-coupled two-stage differential power amplifier with single-ended input and output in 90nm digital CMOS with no RF process options. This work uses on-chip transformers for a 60GHz PA as an integrated CMOS solution. Operating from a IV supply, it achieves a ldB compressed output power of +9dBm and saturated power of +12.3dBm.
132 citations
Patent•
13 Feb 2001TL;DR: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and an output signal that indicates the transitions in the logical input signal as discussed by the authors.
Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.
116 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 9 |
| 2019 | 17 |
| 2018 | 10 |
| 2017 | 20 |
| 2016 | 16 |