US 2022/0034834 A1Published application

Circuit arrangement and sensor arrangements including the same

AssigneeAms AG

InventorsLuigi DI PIRO, Giuseppe PASETTI, Monica SCHIPANI

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Abstract

A circuit arrangement comprises a first branch comprising a resistor of variable resistance and a diode-connected bipolar transistor and a second branch comprising a resistor of fixed resistance and another diode-connected bipolar transistor. A control loop reproduces a voltage drop at the resistor of variable resistance to a voltage drop at the resistor of fixed resistance. Output terminals are connected to the bipolar transistors to supply a differential voltage. The circuit arrangement may be used as an analog frontend circuit in a gas sensor or a temperature sensor arrangement.

Claims15

Dependent claims

A circuit arrangement, comprising:

a first branch comprising:
a terminal for a supply potential;
a resistor of variable resistance;
a bipolar transistor connected as a diode;
a terminal for ground potential connected to the bipolar transistor;
a second branch, comprising:
a resistor of fixed resistance, the resistor of fixed resistance connected to the resistor of the first branch;
another bipolar transistor connected as a diode, the terminal for ground potential connected to the other bipolar transistor;
a control loop configured to reproduce a voltage drop at the resistor of variable resistance to a voltage drop at the resistor of fixed resistance;
an output terminal connected to the bipolar transistor of the first branch and another output terminal connected to the other bipolar transistor of the second branch, the output terminals configured to supply a differential voltage.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/278,740Filed 25 Sep 2019
Priority: EP 18196597.125 Sep 2018
Published: 3 Feb 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G01N 27/122
Of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid , for detecting components in…:…
H03K 17/94
Electronic switching or gating, i.e. not by contact-making and –breaking: characterised by the way in which the control signals are generated
G01K 7/20
The element being a linear resistance, e.g. platinum resistance thermometer: in a specially-adapted circuit, e.g. bridge circuit
G01K 7/21
In a specially-adapted circuit, e.g. bridge circuit: for modifying the output characteristic, e.g. linearising

Family

US 11,940,402 B2Related patent
US 2022/0034834 A1This patent

From the US filing history. Foreign family members aren’t listed.

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