Aktive Klemmen für mehrstufige Verstärker in Über-/Unterspannungszuständen
Anmelder: Dialog Semiconductor GmbH 🇩🇪
Details
- Veröffentlichungs-Nr.
- EP2816438
- Aktenzeichen
- EP13173089
- Anmeldetag
- 20. Juni 2013
- Veröffentlichung
- 15. November 2017
- Erteilung
- 15. November 2017
- Rechtsraum
- EP
- IPC
- G05F1/56G05F1/565
Abstract
The present document relates to multi-stage amplifiers, such as linear regulators or linear voltage regulators (e.g. low-dropout regulators) configured to provide a constant output voltage subject to load transients. A multi-stage amplifier (100, 200) is described. The multi-stage amplifier (100, 200) comprises a differential amplification stage (101) configured to provide a stage output voltage at an output node (255), based on a first input voltage (107) and a second input voltage (108). Furthermore, the multi-stage amplifier (100, 200) comprises a second amplification stage (102) comprising an amplifier current source (261) configured to provide an amplifier current; and an amplifier transistor (260) arranged in series with the amplifier current source; wherein a gate of the amplifier transistor (260) is coupled to the output node (255) of the differential amplification stage (101). In addition, the multi-stage amplifier (100, 200) comprises a detection circuit (300, 310) comprising a detection current source (301, 311) configured to provide a detection current; and a detection transistor (303, 313) arranged in series with the detection current source (301, 311); wherein a gate of the detection transistor (303, 313) is coupled to the output node (255) of the differential amplification stage (101). A mid-point between the detection current source (301, 311) and an input node of the detection transistor (303, 313) forms a sensing point (305, 315). The detection circuit (300, 310) is configured such that the sensing point (305, 315) changes from a default state to a detection state, subject to the stage output voltage at the output node (255) deviating from a default voltage by at least a predetermined threshold value.
Anmelder
- Firma
- Dialog Semiconductor GmbH
- Land
- 🇩🇪 Deutschland
Dialog Semiconductor war ein deutsch-britisches Halbleiterunternehmen mit Sitz in Deutschland, das 2021 von Renesas übernommen wurde. Das Patentportfolio konzentriert sich auf Elektronik und Schaltungstechnik sowie elektrische Energietechnik, mit Nebenschwerpunkt in Steuerungstechnik. Die Anmeldungen stammen aus den Jahren 2000 bis 2018.
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