A high-frequency amplifier for an active EMI filter with a symmetric class B emitter-follower output stage driven by a driver stage, with a sense output resistor. Both terminals of the sense resistor are brought to the noninverting, respecting inverting input of the driver stage through two dividers of the same ratio, in a global voltage feedback loop. The amplifier is configured to provide a high output impedance at 10 kHz and up to 100 MHz, a peak-to-peak output current of 2-10 ampere and a low quiescent current of less than 400 mA. The invention includes EMI filters with such a high-frequency current source, for example in the current-sense current-inject feedback configuration.
HIGH FREQUENCY, HIGH OUTPUT IMPEDANCE AMPLIFIER FOR EMI ACTIVE FILTER APPLICATIONS
2022-10-20
Patent
Electronic Resource
English
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS , Scheinwiderstandsnetzwerke, z.B. Resonanzkreise / H03F Verstärker , AMPLIFIERS |
High frequency, high output impedance amplifier for EMI active filter applications
European Patent Office | 2023
|Wideband, High-Input-Impedance Buffer Amplifier
Online Contents | 1996
Wideband, High-Input-Impedance Buffer Amplifier
NTRS | 1996
|High-Output-Power Polarization-Insensitive Semiconductor Optical Amplifier
British Library Online Contents | 2003
|British Library Online Contents | 2010
|