JP2010249687A - Physical quantity detection device - Google Patents

Physical quantity detection device Download PDF

Info

Publication number
JP2010249687A
JP2010249687A JP2009099932A JP2009099932A JP2010249687A JP 2010249687 A JP2010249687 A JP 2010249687A JP 2009099932 A JP2009099932 A JP 2009099932A JP 2009099932 A JP2009099932 A JP 2009099932A JP 2010249687 A JP2010249687 A JP 2010249687A
Authority
JP
Japan
Prior art keywords
temperature
physical quantity
detection device
voltage
common mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2009099932A
Other languages
Japanese (ja)
Other versions
JP5310219B2 (en
Inventor
Noriyuki Takagi
教行 高木
Tsuneo Maehara
恒男 前原
Hiroshi Inamura
洋 稲村
Atsushi Yoshiyama
厚司 芳山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2009099932A priority Critical patent/JP5310219B2/en
Publication of JP2010249687A publication Critical patent/JP2010249687A/en
Application granted granted Critical
Publication of JP5310219B2 publication Critical patent/JP5310219B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide a physical quantity detection device capable of accurately detecting a physical quantity by suppressing voltage variations of detection elements caused by common mode noise. <P>SOLUTION: A temperature detection device 1 includes temperature sensing diodes 10-12; a capacitor 13; resistors 14, 15; a reference power supply 16; and a comparator 18. One end of each temperature sensing diodes 10-12 is connected to a circuit GND insulated from a vehicle body via the resistor 14, and the other end is connected to the comparator 18 via the resistor 15. To the temperature sensing diodes 10-12, the capacitor 13 is connected in parallel. One end of the reference power supply 16 is connected to the circuit GND and the other end is connected to the comparator 18. The capacitor 13 and the resistors 14, 15 can suppress common mode noise. Therefore, it is possible to suppress voltage variations of the temperature sensing diodes 10-12 caused by common mode noise, thus accurately detecting a temperature. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、物理量を検出する物理量検出装置に関する。   The present invention relates to a physical quantity detection device that detects a physical quantity.

従来、物理量を検出する物理量検出装置として、特許文献１に開示されている半導体装置がある。この半導体装置は、ＩＧＢＴと、感温ダイオードとを備えている。そして、外部に回路を設け、感温ダイオードの電圧を基準電圧と比較することで、ＩＧＢＴの温度に応じた信号を得ることができる。   Conventionally, as a physical quantity detection device for detecting a physical quantity, there is a semiconductor device disclosed in Patent Document 1. This semiconductor device includes an IGBT and a temperature sensitive diode. A signal corresponding to the temperature of the IGBT can be obtained by providing an external circuit and comparing the voltage of the temperature sensitive diode with the reference voltage.

特開２００６−３４４７２１号公報JP 2006-344721 A

ところで、半導体装置や外部回路が、基準大地面とは電気的に絶縁された状態で設けられていた場合、基準大地面と回路との間の浮遊容量によって、半導体装置や外部回路にコモンモードノイズが加わることとなる。この場合、感温ダイオードの電圧が変動してしまい、ＩＧＢＴの温度を正確に検出できないという問題があった。   By the way, when a semiconductor device or an external circuit is provided in a state of being electrically insulated from the reference ground plane, a common mode noise is generated in the semiconductor device or the external circuit due to a stray capacitance between the reference ground plane and the circuit. Will be added. In this case, the voltage of the temperature sensitive diode fluctuates, and there is a problem that the temperature of the IGBT cannot be accurately detected.

本発明はこのような事情に鑑みてなされたものであり、コモンモードノイズによる検出素子の電圧変動を抑え、正確に物理量を検出できる物理量検出装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a physical quantity detection device that can suppress a voltage fluctuation of a detection element due to common mode noise and accurately detect a physical quantity.

そこで、本発明者は、この課題を解決すべく鋭意研究し試行錯誤を重ねた結果、検出素子の両端に抵抗を接続することで、コモンモードノイズを抑えられることを思いつき、本発明を完成するに至った。   Therefore, the present inventor has intensively studied to solve this problem, and as a result of repeated trial and error, has come up with the idea that common mode noise can be suppressed by connecting resistors to both ends of the detection element, and completes the present invention. It came to.

すなわち、請求項１に記載の物理量検出装置は、物理量を検出し、検出結果に応じた電圧を出力する検出素子と、一端が検出素子の一端に接続され、基準電圧を出力する基準電源と、一方の入力端が検出素子の他端に、他方の入力端が基準電源の他端にそれぞれ接続され、検出素子の電圧を基準電源の基準電圧と比較し、比較結果に応じた電圧を出力する比較回路と、を備えた物理量検出装置において、検出素子の一端と基準電源の一端の間、及び、検出素子の他端と比較回路の一方の入力端の間にそれぞれ抵抗を有することを特徴とする。この構成によれば、抵抗により検出素子へのコモンモードノイズの伝導を抑えることができる。そのため、コモンモードノイズによる検出素子の電圧変動を抑え、正確に物理量を検出できる。   That is, the physical quantity detection device according to claim 1 detects a physical quantity, outputs a voltage according to the detection result, a reference power source having one end connected to one end of the detection element and outputting a reference voltage, One input terminal is connected to the other end of the detection element, and the other input terminal is connected to the other end of the reference power supply. The voltage of the detection element is compared with the reference voltage of the reference power supply, and a voltage corresponding to the comparison result is output. A physical quantity detection device comprising a comparison circuit, and having a resistance between one end of the detection element and one end of the reference power supply, and between the other end of the detection element and one input end of the comparison circuit, To do. According to this configuration, conduction of common mode noise to the detection element can be suppressed by the resistor. For this reason, it is possible to accurately detect the physical quantity by suppressing the voltage fluctuation of the detection element due to the common mode noise.

請求項２に記載の物理量検出装置は、検出素子の一端と他端の間にコンデンサを有することを特徴とする。この構成によれば、コンデンサにより検出素子へのコモンモードノイズの伝導をさらに抑えることができる。そのため、コモンモードノイズによる検出素子の電圧変動を抑え、より正確に物理量を検出できる。   The physical quantity detection device according to claim 2 is characterized in that a capacitor is provided between one end and the other end of the detection element. According to this configuration, the conduction of common mode noise to the detection element can be further suppressed by the capacitor. Therefore, it is possible to suppress the voltage fluctuation of the detection element due to the common mode noise and detect the physical quantity more accurately.

請求項３に記載の物理量検出装置は、車両に搭載され、車両における物理量を検出することを特徴とする。この構成によれば、車両に搭載された物理量検出装置において、コモンモードノイズによる検出素子の電圧変動を抑え、正確に物理量を検出できる。   A physical quantity detection device according to a third aspect is mounted on a vehicle and detects a physical quantity in the vehicle. According to this configuration, in the physical quantity detection device mounted on the vehicle, it is possible to suppress the voltage fluctuation of the detection element due to common mode noise and accurately detect the physical quantity.

請求項４に記載の物理量検出装置は、検出素子は、温度によって順方向電圧が変化するダイオードであることを特徴とする。この構成によれば、コモンモードノイズによる影響を抑え、温度を確実に検出することができる。   The physical quantity detection device according to claim 4 is characterized in that the detection element is a diode whose forward voltage changes with temperature. According to this configuration, the influence of common mode noise can be suppressed and the temperature can be reliably detected.

本実施形態における温度検出装置の回路図である。It is a circuit diagram of the temperature detection apparatus in this embodiment.

次に、実施形態を挙げ、本発明をより詳しく説明する。本実施形態では、本発明に係る物理量検出装置を、車両に搭載され、インバータ装置の構成要素であるＩＧＢＴの温度を検出する温度検出装置に適用した例を示す。   Next, the present invention will be described in more detail with reference to embodiments. In this embodiment, an example is shown in which the physical quantity detection device according to the present invention is applied to a temperature detection device that is mounted on a vehicle and detects the temperature of an IGBT that is a constituent element of an inverter device.

まず、図１を参照して温度検出装置の構成について説明する。ここで、図１は、本実施形態における温度検出装置の回路図である。なお、図中の矢印は、コモンモードノイズの伝導経路を示すものである。   First, the configuration of the temperature detection device will be described with reference to FIG. Here, FIG. 1 is a circuit diagram of the temperature detection apparatus in the present embodiment. In addition, the arrow in a figure shows the conduction path of common mode noise.

図１に示す温度検出装置１（物理量検出装置）は、モータを駆動するためのインバータ装置の構成要素であるＩＧＢＴ１００の温度を検出する装置である。温度検出装置１は、ＩＧＢＴ１００の温度に応じたパルス幅のパルス信号を出力する。つまり、ＩＧＢＴ１００の温度をパルス幅変調して出力する。温度検出装置１は、感温ダイオード１０〜１２（検出素子、ダイオード）と、コンデンサ１３と、抵抗１４、１５と、基準電源１６と、定電流源１７と、コンパレータ１８（比較回路）とを備えている。   A temperature detection device 1 (physical quantity detection device) shown in FIG. 1 is a device that detects the temperature of an IGBT 100 that is a component of an inverter device for driving a motor. The temperature detection device 1 outputs a pulse signal having a pulse width corresponding to the temperature of the IGBT 100. That is, the temperature of the IGBT 100 is pulse width modulated and output. The temperature detection device 1 includes temperature-sensitive diodes 10 to 12 (detection elements, diodes), a capacitor 13, resistors 14 and 15, a reference power supply 16, a constant current source 17, and a comparator 18 (comparison circuit). ing.

感温ダイオード１０〜１２は、温度によって順方向電圧が変化する素子である。感温ダイオード１０〜１２は、ＩＧＢＴ１００の近傍に形成され、ＩＧＢＴ１００とともに一体的に樹脂成形されている。感温ダイオード１０〜１２は直列接続されている。直列接続された感温ダイオード１０〜１２の一端である感温ダイオード１２のカソードは、抵抗１４に接続されている。また、直列接続された感温ダイオード１０〜１２の他端である感温ダイオード１０のアノードは、抵抗１５に接続されている。   The temperature sensitive diodes 10 to 12 are elements whose forward voltage changes depending on the temperature. The temperature sensitive diodes 10 to 12 are formed in the vicinity of the IGBT 100 and are integrally molded with the IGBT 100. The temperature sensitive diodes 10 to 12 are connected in series. The cathode of the temperature sensing diode 12 which is one end of the temperature sensing diodes 10 to 12 connected in series is connected to the resistor 14. The anode of the temperature sensing diode 10 which is the other end of the temperature sensing diodes 10 to 12 connected in series is connected to the resistor 15.

コンデンサ１３及び抵抗１４、１５は、感温ダイオード１０〜１２へのコモンモードノイズの伝導を抑えるための素子である。抵抗１４、１５は、同一抵抗値に設定されている。コンデンサ１３は、感温ダイオード１２のカソードと感温ダイオード１０のアノードの間に並列接続されている。抵抗１４の一端は、感温ダイオード１２のカソードに、他端は、車両筐体とは電気的に絶縁された回路ＧＮＤにそれぞれ接続されている。抵抗１５の一端は、感温ダイオード１０のアノードに、他端は、コンパレータ１８にそれぞれ接続されている。   The capacitor 13 and the resistors 14 and 15 are elements for suppressing conduction of common mode noise to the temperature sensitive diodes 10 to 12. The resistors 14 and 15 are set to the same resistance value. The capacitor 13 is connected in parallel between the cathode of the temperature sensitive diode 12 and the anode of the temperature sensitive diode 10. One end of the resistor 14 is connected to the cathode of the temperature-sensitive diode 12, and the other end is connected to a circuit GND that is electrically insulated from the vehicle casing. One end of the resistor 15 is connected to the anode of the temperature-sensitive diode 10, and the other end is connected to the comparator 18.

基準電源１６は、直列接続された感温ダイオード１０〜１２の電圧を比較するための基準電圧を出力する電圧源である。基準電源１６は、振幅及び周期が一定である、時間とともに変化する三角波状の基準電圧を出力する。ここで、三角波状の基準電圧の振幅は、直列接続された感温ダイオード１０〜１２の最大電圧より大きく設定されている。基準電源１６の一端は、抵抗１４の他端とともに回路ＧＮＤに接続されている。つまり、基準電源１６の一端は、抵抗１４を介して感温ダイオード１２のカソードに接続されている。また、基準電源１６の他端は、コンパレータ１８に接続されている。   The reference power supply 16 is a voltage source that outputs a reference voltage for comparing the voltages of the temperature-sensitive diodes 10 to 12 connected in series. The reference power supply 16 outputs a triangular wave-like reference voltage that has a constant amplitude and period and changes with time. Here, the amplitude of the triangular reference voltage is set larger than the maximum voltage of the temperature-sensitive diodes 10 to 12 connected in series. One end of the reference power supply 16 is connected to the circuit GND together with the other end of the resistor 14. That is, one end of the reference power supply 16 is connected to the cathode of the temperature sensitive diode 12 via the resistor 14. The other end of the reference power supply 16 is connected to the comparator 18.

定電流源１７は、直列接続された感温ダイオード１０〜１２に供給するための定電流を出力する電流源である。定電流源１７の一端は、回路電源Ｖｃｃに接続されている。また、他端は、抵抗１５の他端に接続されている。   The constant current source 17 is a current source that outputs a constant current to be supplied to the temperature-sensitive diodes 10 to 12 connected in series. One end of the constant current source 17 is connected to the circuit power supply Vcc. The other end is connected to the other end of the resistor 15.

コンパレータ１８は、直列接続された感温ダイオード１０〜１２の電圧を基準電源１６の基準電圧と比較し、比較結果に応じた電圧を出力する素子である。コンパレータ１８は、直列接続された感温ダイオード１０〜１２の電圧を三角波状の基準電圧と比較することで、感温ダイオード１０〜１２の電圧に応じたパルス幅を有するパルス信号を出力する。つまり、直列接続された感温ダイオード１０〜１２の電圧をパルス幅変調して出力する。コンパレータ１８の非反転入力端は、抵抗１５の他端に接続されている。また、反転入力端は、基準電源１６の他端に接続されている。さらに、出力端は、ＩＧＢＴ１００のスイッチングを制御する制御回路（図略）に接続されている。   The comparator 18 is an element that compares the voltage of the temperature-sensitive diodes 10 to 12 connected in series with the reference voltage of the reference power supply 16 and outputs a voltage corresponding to the comparison result. The comparator 18 outputs a pulse signal having a pulse width corresponding to the voltage of the temperature-sensitive diodes 10 to 12 by comparing the voltage of the temperature-sensitive diodes 10 to 12 connected in series with a triangular-wave reference voltage. That is, the voltage of the temperature-sensitive diodes 10 to 12 connected in series is subjected to pulse width modulation and output. The non-inverting input terminal of the comparator 18 is connected to the other end of the resistor 15. Further, the inverting input terminal is connected to the other end of the reference power supply 16. Furthermore, the output terminal is connected to a control circuit (not shown) that controls switching of the IGBT 100.

次に、図１を参照して温度検出装置の動作の概略について説明する。図１に示すインバータ装置の構成要素であるＩＧＢＴ１００は、制御回路によって制御されスイッチングする。スイッチングに伴って電流が流れるとＩＧＢＴ１００の温度が上昇する。ＩＧＢＴ１００の温度上昇に伴って直列接続された感温ダイオード１０〜１２の順方向電圧が変化する。直列接続された感温ダイオード１０〜１２の順方向電圧はコンパレータ１８に入力される。コンパレータ１８は、直列接続された感温ダイオード１０〜１２の順方向電圧を基準電源１６の三角波状の基準電源と比較する。コンパレータ１８は、直列接続された感温ダイオードの順方向電圧が基準電圧より大きいときハイレベルの電圧を、順方向電圧が基準電圧以下のときローレベルの電圧を出力する。これにより、順方向電圧の大きさに応じたパルス幅のパルス信号が出力される。つまり、ＩＧＢＴ１００の温度がパルス幅変調されて出力されることとなる。コンパレータ１８の出力するパルス信号は、制御回路に入力される。制御回路は、パルス信号に基づいてＩＧＢＴ１００を適切に制御する。   Next, an outline of the operation of the temperature detection device will be described with reference to FIG. IGBT100 which is a component of the inverter apparatus shown in FIG. 1 is controlled and switched by a control circuit. When current flows along with switching, the temperature of the IGBT 100 rises. As the temperature of the IGBT 100 increases, the forward voltage of the temperature-sensitive diodes 10 to 12 connected in series changes. The forward voltage of the temperature-sensitive diodes 10 to 12 connected in series is input to the comparator 18. The comparator 18 compares the forward voltage of the temperature-sensitive diodes 10 to 12 connected in series with the triangular wave reference power supply of the reference power supply 16. The comparator 18 outputs a high level voltage when the forward voltage of the temperature-sensitive diodes connected in series is larger than the reference voltage, and outputs a low level voltage when the forward voltage is less than or equal to the reference voltage. As a result, a pulse signal having a pulse width corresponding to the magnitude of the forward voltage is output. That is, the temperature of the IGBT 100 is pulse-width modulated and output. The pulse signal output from the comparator 18 is input to the control circuit. The control circuit appropriately controls the IGBT 100 based on the pulse signal.

ここで、温度検出装置１の外部にノイズ源Ｎが形成されると、温度検出装置１にコモンモードノイズが加わることとなる。コモンモードノイズは、ノイズ源Ｎからコンパレータ１８に伝わり、コンパレータ１８の非反転入力端から感温ダイオード１０のアノードに伝わる。また、コンパレータ１８の反転入力端から回路ＧＮＤを介して感温ダイオード１２のカソードに伝わる。そして、温度検出装置１と車両筐体との間に形成される浮遊容量Ｃｆ１を介して車両筐体Ｂに伝わり、車両筐体Ｂとノイズ源Ｎの間に形成される浮遊容量Ｃｆ２を介してノイズ源Ｎに戻る。   Here, when the noise source N is formed outside the temperature detection device 1, common mode noise is added to the temperature detection device 1. The common mode noise is transmitted from the noise source N to the comparator 18, and is transmitted from the non-inverting input terminal of the comparator 18 to the anode of the temperature sensitive diode 10. Further, the signal is transmitted from the inverting input terminal of the comparator 18 to the cathode of the temperature sensitive diode 12 through the circuit GND. And it is transmitted to the vehicle casing B via the stray capacitance Cf1 formed between the temperature detection device 1 and the vehicle casing, and via the stray capacitance Cf2 formed between the vehicle casing B and the noise source N. Return to noise source N.

しかし、コモンモードノイズの一方の伝導経路であるコンパレータ１８の非反転入力端と感温ダイオード１０のアノードの間には、抵抗１５が設けられている。また、コモンモードノイズの他方の伝導経路である回路ＧＮＤと感温ダイオード１２のカソードの間にも、抵抗１４が設けられている。さらに、これらのコモンモードノイズの伝導経路間には、コンデンサ１３が設けられている。そのため、感温ダイオード１０〜１２へのコモンモードノイズの伝導を抑えることができる。従って、コモンモードノイズによる感温ダイオード１０〜１２の電圧変動を抑え、ＩＧＢＴ１００の温度をより正確に検出できる。   However, a resistor 15 is provided between the non-inverting input terminal of the comparator 18 which is one conduction path of common mode noise and the anode of the temperature sensitive diode 10. A resistor 14 is also provided between the circuit GND which is the other conduction path of common mode noise and the cathode of the temperature sensitive diode 12. Further, a capacitor 13 is provided between these common mode noise conduction paths. Therefore, conduction of common mode noise to the temperature sensitive diodes 10 to 12 can be suppressed. Therefore, the voltage fluctuation of the temperature sensitive diodes 10 to 12 due to the common mode noise can be suppressed, and the temperature of the IGBT 100 can be detected more accurately.

最後に、効果について説明する。本実施形態によれば、抵抗１４、１５により感温ダイオード１０〜１２へのコモンモードノイズの伝導を抑えることができる。そのため、車両に搭載された温度検出装置１において、コモンモードノイズによる感温ダイオード１０〜１２の電圧変動を抑え、ＩＧＢＴ１００の温度を正確に検出できる。   Finally, the effect will be described. According to this embodiment, conduction of common mode noise to the temperature sensitive diodes 10 to 12 can be suppressed by the resistors 14 and 15. Therefore, in the temperature detection device 1 mounted on the vehicle, voltage fluctuations of the temperature sensitive diodes 10 to 12 due to common mode noise can be suppressed, and the temperature of the IGBT 100 can be accurately detected.

また、本実施形態によれば、コンデンサ１３により感温ダイオード１０〜１２へのコモンモードノイズの伝導をさらに抑えることができる。そのため、コモンモードノイズによる感温ダイオード１０〜１２の電圧変動を抑え、ＩＧＢＴ１００の温度をより正確に検出できる。   Further, according to the present embodiment, the conduction of common mode noise to the temperature sensitive diodes 10 to 12 can be further suppressed by the capacitor 13. Therefore, voltage fluctuations of the temperature sensitive diodes 10 to 12 due to common mode noise can be suppressed, and the temperature of the IGBT 100 can be detected more accurately.

さらに、本実施形態によれば、温度によって順方向電圧が変化する感温ダイオード１０〜１２を備えている。そのため、コモンモードノイズによる影響を抑え、ＩＧＢＴ１００の温度を確実に検出することができる。   Furthermore, according to the present embodiment, the temperature sensitive diodes 10 to 12 whose forward voltage changes with temperature are provided. Therefore, the influence of common mode noise can be suppressed and the temperature of the IGBT 100 can be reliably detected.

なお、本実施形態では、基準電源１６が時間とともに変化する三角波状の基準電圧を出力し、ＩＧＢＴ１００の温度をパルス幅変調して出力する例を挙げているが、これに限られるものではない。基準電圧は、例えば鋸歯状でもよい。また、時間によらず一定であってもよい。この場合、ＩＧＢＴ１００の温度が所定温度より高いか低いかを検出することができる。   In the present embodiment, an example is given in which the reference power supply 16 outputs a triangular wave-like reference voltage that changes with time, and the temperature of the IGBT 100 is output by pulse width modulation. However, the present invention is not limited to this. The reference voltage may be, for example, serrated. Moreover, it may be constant regardless of time. In this case, it is possible to detect whether the temperature of the IGBT 100 is higher or lower than a predetermined temperature.

また、本実施形態では、感温ダイオード１０〜１２によってＩＧＢＴ１００の温度を検出している例に挙げているが、これに限られるものではない。感温ダイオード以外の検出素子によって温度以外の物理量を検出してもよい。この場合においても、同様の効果を得ることができる。   In the present embodiment, the temperature of the IGBT 100 is detected by the temperature-sensitive diodes 10 to 12, but the present invention is not limited to this. A physical quantity other than temperature may be detected by a detection element other than the temperature sensitive diode. In this case, the same effect can be obtained.

１・・・温度検出装置、１０〜１２・・・感温ダイオード（検出素子、ダイオード）、１３・・・コンデンサ、１４、１５・・・抵抗、１６・・・基準電源、１７・・・定電流源、１８・・・コンパレータ（比較回路）、１００・・・ＩＧＢＴ、Ｎ・・・ノイズ源、Ｂ・・・車両筐体 DESCRIPTION OF SYMBOLS 1 ... Temperature detection apparatus, 10-12 ... Temperature sensitive diode (detection element, diode), 13 ... Capacitor, 14, 15 ... Resistance, 16 ... Reference power supply, 17 ... Constant Current source, 18 ... comparator (comparison circuit), 100 ... IGBT, N ... noise source, B ... vehicle housing

Claims (4)

物理量を検出し、検出結果に応じた電圧を出力する検出素子と、
一端が前記検出素子の一端に接続され、基準電圧を出力する基準電源と、
一方の入力端が前記検出素子の他端に、他方の入力端が前記基準電源の他端にそれぞれ接続され、前記検出素子の電圧を前記基準電源の前記基準電圧と比較し、比較結果に応じた電圧を出力する比較回路と、
を備えた物理量検出装置において、
前記検出素子の前記一端と前記基準電源の前記一端の間、及び、前記検出素子の前記他端と前記比較回路の前記一方の入力端の間にそれぞれ抵抗を有することを特徴とする物理量検出装置。 A detection element that detects a physical quantity and outputs a voltage according to the detection result;
A reference power supply having one end connected to one end of the detection element and outputting a reference voltage;
One input end is connected to the other end of the detection element, and the other input end is connected to the other end of the reference power supply, and the voltage of the detection element is compared with the reference voltage of the reference power supply, and the comparison result A comparator circuit that outputs
In a physical quantity detection device comprising:
A physical quantity detection device having a resistance between the one end of the detection element and the one end of the reference power supply, and between the other end of the detection element and the one input end of the comparison circuit. . 前記検出素子の前記一端と前記他端の間にコンデンサを有することを特徴とする請求項１に記載の物理量検出装置。   The physical quantity detection device according to claim 1, further comprising a capacitor between the one end and the other end of the detection element. 車両に搭載され、車両における物理量を検出することを特徴とする請求項１又は２のいずれか１項に記載の物理量検出装置。   The physical quantity detection device according to claim 1, wherein the physical quantity detection device is mounted on a vehicle and detects a physical quantity in the vehicle. 前記検出素子は、温度によって順方向電圧が変化するダイオードであることを特徴とする請求項１〜３のいずれか１項に記載の物理量検出装置。   The physical quantity detection device according to claim 1, wherein the detection element is a diode whose forward voltage changes with temperature.
JP2009099932A 2009-04-16 2009-04-16 Physical quantity detection device Active JP5310219B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009099932A JP5310219B2 (en) 2009-04-16 2009-04-16 Physical quantity detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009099932A JP5310219B2 (en) 2009-04-16 2009-04-16 Physical quantity detection device

Publications (2)

Publication Number Publication Date
JP2010249687A true JP2010249687A (en) 2010-11-04
JP5310219B2 JP5310219B2 (en) 2013-10-09

Family

ID=43312185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009099932A Active JP5310219B2 (en) 2009-04-16 2009-04-16 Physical quantity detection device

Country Status (1)

Country Link
JP (1) JP5310219B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013214914A (en) * 2012-04-04 2013-10-17 Mitsubishi Electric Corp Switch element temperature detection circuit
CN108762169A (en) * 2018-07-31 2018-11-06 成都锐成芯微科技股份有限公司 Battary removal detection circuit and its detection method
WO2018235572A1 (en) * 2017-06-23 2018-12-27 日立オートモティブシステムズ株式会社 Detector and power conversion device
WO2019026623A1 (en) * 2017-08-04 2019-02-07 三洋電機株式会社 Circuit device and detection system
WO2019026656A1 (en) * 2017-08-04 2019-02-07 三洋電機株式会社 Circuit device and temperature detection system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000307403A (en) * 1999-04-26 2000-11-02 Toyota Motor Corp Structure and device for detecting temperature of semiconductor switch element chip, and semiconductor relay
JP2002164509A (en) * 2000-11-27 2002-06-07 Mitsubishi Electric Corp Semiconductor device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000307403A (en) * 1999-04-26 2000-11-02 Toyota Motor Corp Structure and device for detecting temperature of semiconductor switch element chip, and semiconductor relay
JP2002164509A (en) * 2000-11-27 2002-06-07 Mitsubishi Electric Corp Semiconductor device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013214914A (en) * 2012-04-04 2013-10-17 Mitsubishi Electric Corp Switch element temperature detection circuit
WO2018235572A1 (en) * 2017-06-23 2018-12-27 日立オートモティブシステムズ株式会社 Detector and power conversion device
JP2019009905A (en) * 2017-06-23 2019-01-17 日立オートモティブシステムズ株式会社 Detector and power conversion equipment
CN110832759A (en) * 2017-06-23 2020-02-21 日立汽车系统株式会社 Detector and power conversion device
CN110832759B (en) * 2017-06-23 2021-12-14 日立安斯泰莫株式会社 Detector and power conversion device
US11303223B2 (en) 2017-06-23 2022-04-12 Hitachi Astemo, Ltd. Detector and power conversion apparatus
WO2019026623A1 (en) * 2017-08-04 2019-02-07 三洋電機株式会社 Circuit device and detection system
WO2019026656A1 (en) * 2017-08-04 2019-02-07 三洋電機株式会社 Circuit device and temperature detection system
JPWO2019026656A1 (en) * 2017-08-04 2020-06-18 三洋電機株式会社 Circuit device and temperature detection system
JP7186703B2 (en) 2017-08-04 2022-12-09 三洋電機株式会社 Circuit device and temperature sensing system
US11592340B2 (en) 2017-08-04 2023-02-28 Sanyo Electric Co., Ltd. Circuit device and temperature detection system
CN108762169A (en) * 2018-07-31 2018-11-06 成都锐成芯微科技股份有限公司 Battary removal detection circuit and its detection method

Also Published As

Publication number Publication date
JP5310219B2 (en) 2013-10-09

Similar Documents

Publication Publication Date Title
JP4752811B2 (en) Drive circuit for voltage-driven element
US20120126859A1 (en) Load driver with constant current variable structure
JP5287916B2 (en) Load drive device
JP5310219B2 (en) Physical quantity detection device
JP6498473B2 (en) Switch drive circuit
TWI438412B (en) Temperature detection circuit
US7835129B2 (en) Circuit arrangement for overtemperature detection
JPWO2015079492A1 (en) Gate drive circuit and intelligent power module
JP2010193034A (en) Overcurrent protection circuit
JP5499792B2 (en) Output integrated circuit for sensor and sensor device
JP2010193033A (en) Overcurrent protection circuit
US8487574B2 (en) Fan rotary speed controlling device
JP5941718B2 (en) Signal processing circuit, in-vehicle electronic control device, and mounting method of signal processing circuit in in-vehicle electronic control device
JP6476049B2 (en) Temperature sensor circuit
JP6588229B2 (en) Overheat protection circuit, semiconductor integrated circuit device using the same, and vehicle
JP2006349466A (en) Temperature detecting device
KR101854754B1 (en) Signal transfer circuit
JP6658269B2 (en) Overcurrent detection circuit
CN112313489B (en) Temperature detection circuit for vehicle
JP4148243B2 (en) Abnormality detection circuit
KR20070023179A (en) Apparatus for Alarming Overheat of Intelligent Power Module
US9883611B2 (en) Fan control circuit
JP4171238B2 (en) Overheat detection circuit
JP5861834B2 (en) Energization control device for gas detection element
JP6758221B2 (en) Switching circuit

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110630

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20121010

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20121023

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20121212

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130305

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130409

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130604

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130617

R151 Written notification of patent or utility model registration

Ref document number: 5310219

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250