VOLTAGE OUTPUT CIRCUIT AND VEHICLE CONTROL SYSTEM

• Main Authors: KUME MASAYOSHI, KIDO KEISUKE, KOMATSU KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 15.01.2015
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

PROBLEM TO BE SOLVED: To provide a technique for preventing an air-fuel ration control apparatus from malfunctioning at a time of recovery from a state in which an output of a voltage buffer unit is Hi impedance.SOLUTION: A voltage output circuit for outputting an input voltage to an outside, comprises: an error amplifier including a first inverting input terminal and a second inverting input terminal; a first output buffer outputting an output voltage from the error amplifier to the outside and to the first inverting input terminal; a second buffer outputting the output voltage from the error amplifier to the second inverting input terminal; and switching means switching over between connection between the first output buffer and the first inverting input terminal and connection between the second output buffer and the second inverting input terminal. 【課題】電圧バッファ部の出力をＨｉインピーダンスにした状態から復帰する際に、空燃比を制御する装置が誤動作することを回避する技術を提供する。【解決手段】入力電圧を外部に出力する電圧出力回路であって、第１反転入力端子及び第２反転入力端子を有する誤差アンプと、前記誤差アンプの出力電圧を外部及び前記第１反転入力端子に出力する第１出力バッファと、前記誤差アンプの出力電圧を前記第２反転入力端子に出力する第２出力バッファと、前記第１出力バッファと第１反転入力端子との接続、及び、第２出力バッファと第２反転入力端子との接続を切り替える切替手段と、を備えている。【選択図】図４