Patent ID: 11942934
Assignee: ROBERT BOSCH GMBH
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A circuit arrangement, comprising:
a first level converter, and a second level converter, each of which includes:
a transistor;
an impedance converter;
an input voltage connection;
an output voltage connection; and
a power supply connection;

wherein:
the input voltage connection is connected to a gate terminal of the transistor and is configured to be connected to an input voltage that is to be shifted by the level converter,
the output voltage connection is connected to a source terminal of the transistor and to the power supply connection and is configured to provide the input voltage that is to be shifted by the level converter as an output voltage,
a first input terminal of the impedance converter is connected to the source terminal of the transistor,
an output terminal of the impedance converter is connected to a drain terminal of the transistor,
the power supply connection is configured to receive a current from a constant current source, and
the impedance converter is configured to keep a source-drain voltage of the transistor at a predefined value using a reference voltage,

wherein:
the first level converter is configured to shift a positive input signal that is related to a negative input signal by a predefined level,
the second level converter is configured to shift the negative input signal by the same predefined level as the first level converter, and
the circuit arrangement is configured to be used for a differential measurement between a positive output signal of the first level converter and a negative output signal of the second level converter;

wherein the circuit arrangement includes the first level converter and the second level converter that are arranged together in an integrated circuit, wherein a positive input signal, which is related to the negative input signal, is fed into the input voltage connection of the first level converter, wherein the negative input signal, which is related to the positive input signal, is fed into the input voltage connection of the second level converter, and
wherein both the level converters raise the negative input signal and the positive input signal each by the same value, and wherein by the output voltage connection of the first level converter, a correspondingly level-shifted positive output signal is emitted which corresponds to a negative output signal of the output voltage connection of the second level converter.