MULTI-FEEDING DETECTION DEVICE, CONVEYANCE APPARATUS, AND IMAGE READING APPARATUS

To provide a multi-feeding detection device, a conveyance apparatus, and an image reading apparatus which can increase a driving speed of a push-pull circuit outputting a driving signal to a transmission element.SOLUTION: A drive circuit outputs a driving signal to a transmission element. The drive circuit has a push-pull circuit. The push-pull circuit outputs the driving signal in which the current is amplified. The push-pull circuit includes a first N-type MOSFET and a second N-type MOSFET and is the circuit in which a source terminal of the first N-type MOSFET is connected to a drain terminal of the second N-type MOSFET. The drive circuit is the circuit in which a conversion signal in which the voltage level is inverted in comparison to a reference signal is input to a gate terminal of the first N-type MOSFET and the reference signal is input to a gate terminal of the second N-type MOSFET. The second adjustment circuit makes timing of the fall of the conversion signal input to the gate terminal of the first N-type MOSFET earlier.SELECTED DRAWING: Figure 4 【課題】発信素子に駆動信号を出力するプッシュプル回路の駆動速度を高めることができる重送検知装置、搬送装置及び画像読取装置を提供する。【解決手段】駆動回路は、発信素子に駆動信号を出力する。駆動回路は、プッシュプル回路を有する。プッシュプル回路は、電流を増幅させた駆動信号を出力する。プッシュプル回路は、第１Ｎ型ＭＯＳＦＥＴと第２Ｎ型ＭＯＳＦＥＴとを有し、第１Ｎ型ＭＯＳＦＥＴのソース端子と第２Ｎ型ＭＯＳＦＥＴのドレイン端子とが接続された回路である。駆動回路は、第１Ｎ型ＭＯＳＦＥＴのゲート端子に、基準信号と比較して電圧レベルが反転する変換信号が入力される一方で、第２Ｎ型ＭＯＳＦＥＴのゲート端子に基準信号が入力される回路である。第２調整回路は、第１Ｎ型ＭＯＳＦＥＴのゲート端子に入力される変換信号の立ち下がりのタイミングを早くする。【選択図】図４