Electronic device and magnetic sensor integrated circuit

Patent metadata

Field	Value
Publication number	US-10295371-B2
Application number	US-201615231221-A
Country	US
Kind code	B2
Filing date	Aug 8, 2016
Priority date	Aug 8, 2014
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

An electronic device and a magnetic sensor integrated circuit thereof are provided. The magnetic sensor integrated circuit includes a shell, a semiconductor substrate installed in the shell and a first to a third port extending from the shell. A rectifier and a position sensor are provided on the semiconductor substrate. The rectifier includes first and second output terminals and two input terminals respectively connected to the first and second ports. In a case that the first and second ports are positively or negatively connected to an external power supply, a voltage output by the first output terminal of the rectifier is higher than the voltage output by the second output terminal of the rectifier. The position sensor is connected to the first and second output terminals of the rectifier, and a magnetic field signal detected by the position sensor is output by the third port.

First claim

The invention claimed is:

1. A magnetic sensor integrated circuit, comprising a shell, a semiconductor substrate installed in the shell, and a first to a third port extending from the shell, wherein the semiconductor substrate is provided with:
a rectifier directly powered by a direct current power supply and comprising a first output terminal, a second output terminal and two input terminals respectively connected to the first port and the second port, wherein in a case that the first port and the second port are positively or negatively connected to the direct current power supply, a voltage output by the first output terminal of the rectifier is higher than the voltage output by the second output terminal of the rectifier; and
a position sensor configured to detect a magnetic field, wherein the position sensor is connected to the first output terminal and the second output terminal of the rectifier, and a magnetic field signal detected by the position sensor is output via the third port; and
an output control circuit comprising a first resistor, a NPN triode, a second resistor and a diode, the second resistor and the diode are connected in series between the output terminal of the position sensor and the third port, a cathode of the diode is connected to the output terminal of the position sensor, one end of the first resistor is connected to the first output terminal of the rectifier, and another end is connected to the output terminal of the position sensor, a base of the NPN triode is connected to the output terminal of the position sensor, an emitter of the NPN triode is connected to an anode of the diode, and a collector of the NPN triode is connected to the first output terminal of the rectifier.

2. The magnetic sensor integrated circuit according to claim 1 , wherein the position sensor comprises a power supply terminal, a ground terminal and an output terminal, the power supply terminal is connected to the first output terminal of the rectifier, the ground terminal is connected to the second output terminal of the rectifier, and the output terminal of the position sensor is connected to the third port.

3. The magnetic sensor integrated circuit according to claim 1 , wherein output control circuit comprises a first to a third terminal, the first terminal is connected to the first output terminal of the rectifier, the second terminal is connected to an output terminal of the position sensor, the third terminal is connected to the third port, and a signal output by the third terminal of the output control circuit is determined based on a magnetic field signal output by the output terminal of the position sensor.

4. The magnetic sensor integrated circuit according to claim 3 , wherein in a case that the magnetic field signal output by the output terminal of the position sensor is a logic high, the third terminal of the output control circuit outputs a logic high; and in a case that the magnetic field signal output by the output terminal of the position sensor is a logic low, the third terminal of the output control circuit outputs a logic low.

5. The magnetic sensor integrated circuit according to claim 1 , wherein the magnetic sensor integrated circuit comprises a single one bare die, or comprises more than one bare die.

6. The magnetic sensor integrated circuit according to claim 1 , wherein the third port is located between the first port and the second port.

7. The magnetic sensor integrated circuit according to claim 6 , wherein a distance between the third port and the first port is the same as a distance between the third port and the second port.

8. The magnetic sensor integrated circuit according to claim 1 , wherein the position sensor is a Hall sensor.

9. The magnetic sensor integrated circuit according to claim 1 , wherein a voltage stabilizer is provided between the first output terminal and the second output terminal of the rectifier.

10. A magnetic sensor integrated circuit, comprising a shell, a semiconductor substrate installed in the shell, and a first to a third port extending from the shell, wherein the semiconductor substrate is provided with:
a rectifier comprising a first output terminal, a second output terminal and two input terminals respectively connected to the first port and the second port, wherein in a case that the first port and the second port are positively or negatively connected to an external power supply, a voltage output by the first output terminal of the rectifier is higher than the voltage output by the second output terminal of the rectifier; and
a position sensor configured to detect a magnetic field, wherein the position sensor is connected to the first output terminal and the second output terminal of the rectifier, and a magnetic field signal detected by the position sensor is output via the third port; and
an output control circuit comprising a first resistor, a NPN triode, a second resistor and a diode, the second resistor and the diode are connected in series between an output terminal of the position sensor and the third port, a cathode of the diode is connected to the output terminal of the position sensor, one end of the first resistor is connected to the first output terminal of the rectifier, and another end is connected to the output terminal of the position sensor, a base of the NPN triode is connected to the output terminal of the position sensor, an emitter of the NPN triode is connected to an anode of the diode, and a collector of the NPN triode is connected to the first output terminal of the rectifier.

Assignees

• Johnson Electric Int Ag

Inventors

• Sun Chi Ping
• Xin Fei
• Wong Ken
• Yeung Shing Hin
• Huang Shu Juan
• Jiang Yun Long
• Li Yue
• Liu Bao Ting
• Wang En Hui
• Yang Xiu Wen
• Liu li sheng
• Cui yan yun

Classifications

• H01L43/06

  Electricity · mapped topic

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02P6/30

  Arrangements for controlling the direction of rotation (H02P6/22 takes precedence) · CPC title

• H02P2207/05

  Synchronous machines, e.g. with permanent magnets or DC excitation · CPC title

• H02P7/05

  by means of electronic switching · CPC title