Ladungsverstärkerschaltung für eine Kapazitive Sensoranordnung

Details

Veröffentlichungs-Nr.

EP4645691

Aktenzeichen

EP24173982

Anmeldetag

3. Mai 2024

Veröffentlichung

5. November 2025

Rechtsraum

EP

IPC

H03F3/00H03F3/45H03F3/70H03F1/26H03F1/48H03F3/387

Abstract

The present disclosure relates to a charge amplifier circuit (10) for a capacitive sensing arrangement (80), the charge amplifier circuit (10) comprising: - an first amplifier stage (20) comprising a first amplifier input (22), a second amplifier input (23) connectable to the capacitive sensing arrangement (80), and comprising a first amplifier output (24) and a second amplifier output (25), - a second amplifier stage (30) comprising a first amplifier input (32), a second amplifier input (33), a first amplifier output (34) and a second amplifier output (35), and - a switched capacitor arrangement (40) between the first amplifier stage (20) and the second amplifier stage (30), the switched capacitor arrangement (40) comprising a first integration capacitor (42), a second integration capacitor (43), a number of first switches (66, 67) and a number of second switches (68, 69).

Anmelder

Firma

EM Microelectronic-Marin SA

Land

🇨🇭 Schweiz

Fachgebiete