JP7202297B2 - 撮像装置および電子機器 - Google Patents
撮像装置および電子機器 Download PDFInfo
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- JP7202297B2 JP7202297B2 JP2019529318A JP2019529318A JP7202297B2 JP 7202297 B2 JP7202297 B2 JP 7202297B2 JP 2019529318 A JP2019529318 A JP 2019529318A JP 2019529318 A JP2019529318 A JP 2019529318A JP 7202297 B2 JP7202297 B2 JP 7202297B2
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Description
本実施の形態では、本発明の一態様である撮像装置について、図面を参照して説明する。
図1は、本発明の一態様の撮像装置に用いることができる画素11aを説明する図である。画素11aは、光電変換素子101と、トランジスタ102と、トランジスタ103と、インバータ回路INV1と、容量素子106を有する。インバータ回路INV1はCMOS(complementary metal oxide semiconductor)回路の構成を有し、n-ch型のトランジスタ104と、p-ch型のトランジスタ105を有する。なお、容量素子106を設けない構成としてもよい。
図5(A)は、画素11aの変形例である画素12aを説明する図である。画素12aは、画素11aにトランジスタ110を加えた構成を有する。トランジスタ110のゲートは、配線126と電気的に接続される。トランジスタ110のソースまたはドレインの一方はインバータ回路INV1の入力端子と電気的に接続され、ソースまたはドレインの他方は配線131と電気的に接続される。なお、画素12aの構成において、トランジスタ110はp-ch型とする。
図7(A)は、画素11aの変形例である画素13aを説明する図である。画素13aは、画素11aにインバータ回路INV2を加えた構成を有する。インバータ回路INV2の入力端子は、インバータ回路INV1の出力端子と電気的に接続される。インバータ回路INV2の出力端子は、配線126と電気的に接続される。
図9(A)は、画素12aおよび画素13aの変形例である画素14aを説明する図である。画素14aは、画素12aおよび画素13aの要素を組み合わせた構成を有する。画素14aは、トランジスタ110およびインバータ回路INV2を有する。トランジスタ110のゲートは、ノードADと電気的に接続される。なお、画素14aの構成において、トランジスタ110はp-ch型とする。
図12(A)は、画素13aの変形例である画素16aを説明する図である。画素16aは、画素13aに容量素子114を加えた構成を有する。容量素子114の一方の電極は配線126と電気的に接続される。容量素子114の他方の電極は、インバータ回路INV1の入力端子と電気的に接続される。
図14(A)は、画素11aの変形例である画素17aを説明する図である。画素17aは、画素11aにトランジスタ115、116、117を加えた構成を有する。
図17(A)は、前述した本発明の一態様の画素を複数有する撮像装置を説明するブロック図である。撮像装置は、画素アレイ180、回路170、回路171、および回路172有する。画素アレイ180は、マトリクス状に配置された回路160を有する。
本実施の形態では、実施の形態1で説明した応用例に用いることのできるニューラルネットワークに用いることが可能な半導体装置の構成例について説明する。
図19に、ニューラルネットワークの演算を行う機能を有する半導体装置MACの構成例を示す。半導体装置MACは、ニューロン間の結合強度(重み)に対応する第1のデータと、入力データに対応する第2のデータの積和演算を行う機能を有する。なお、第1のデータおよび第2のデータはそれぞれ、アナログデータまたは多値のデータ(離散的なデータ)とすることができる。また、半導体装置MACは、積和演算によって得られたデータを活性化関数によって変換する機能を有する。
上記の半導体装置MACを用いて、第1のデータと第2のデータの積和演算を行うことができる。以下、積和演算を行う際の半導体装置MACの動作例を説明する。
まず、時刻T01-T02において、配線WL[1]の電位がハイレベルとなり、配線WD[1]の電位が接地電位(GND)よりもVPR-VW[1,1]大きい電位となり、配線WDrefの電位が接地電位よりもVPR大きい電位となる。また、配線RW[1]、および配線RW[2]の電位が基準電位(REFP)となる。なお、電位VW[1,1]はメモリセルMC[1,1]に格納される第1のデータに対応する電位である。また、電位VPRは参照データに対応する電位である。これにより、メモリセルMC[1,1]およびメモリセルMCref[1]が有するトランジスタTr11がオン状態となり、ノードNM[1,1]の電位がVPR-VW[1,1]、ノードNMref[1]の電位がVPRとなる。
次に、時刻T05-T06において、配線RW[1]の電位が基準電位よりもVX[1]大きい電位となる。このとき、メモリセルMC[1,1]、およびメモリセルMCref[1]のそれぞれの容量素子C11には電位VX[1]が供給され、容量結合によりトランジスタTr12のゲートの電位が上昇する。なお、電位Vx[1]はメモリセルMC[1,1]およびメモリセルMCref[1]に供給される第2のデータに対応する電位である。
本実施の形態では、本発明の一態様の撮像装置の構成例などについて説明する。
本発明の一態様に係る撮像装置を用いることができる電子機器として、表示機器、パーソナルコンピュータ、記録媒体を備えた画像記憶装置または画像再生装置、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図31(A)乃至(F)に示す。
Claims (12)
- 光電変換素子と、第1のトランジスタと、第2のトランジスタと、第1のインバータ回路と、を有し、
前記第1のインバータ回路はCMOS回路の構成を有し、
前記光電変換素子の一方の電極は、前記第1のトランジスタのソースまたはドレインの一方と電気的に接続され、
前記第1のトランジスタのソースまたはドレインの他方は、前記第2のトランジスタのソースまたはドレインの一方と電気的に接続され、
前記第2のトランジスタのソースまたはドレインの一方は、前記第1のインバータ回路の入力端子と電気的に接続され、
前記第1のトランジスタと、前記第2のトランジスタは、チャネル形成領域に金属酸化物を有するトランジスタである撮像装置。 - 請求項1において、
さらに第2のインバータ回路を有し、
前記第2のインバータ回路はCMOS回路の構成を有し、
前記第2のインバータ回路の入力端子は、前記第1のインバータ回路の出力端子と電気的に接続されている撮像装置。 - 請求項1または2において、
さらに第3のトランジスタを有し、
前記第3のトランジスタのゲートは前記第1のインバータ回路の出力端子と電気的に接続され、
前記第3のトランジスタのソースまたはドレインの一方は、前記第1のインバータ回路の入力端子と電気的に接続されている撮像装置。 - 請求項2において、
さらに第4のトランジスタを有し、
前記第4のトランジスタのゲートは前記第2のインバータ回路の出力端子と電気的に接続され、
前記第4のトランジスタのソースまたはドレインの一方は、前記第1のインバータ回路の入力端子と電気的に接続されている撮像装置。 - 請求項2において、
さらに第1の容量素子を有し、
前記第1の容量素子の一方の電極は、前記第2のインバータ回路の出力端子と電気的に接続され、
前記第1の容量素子の他方の電極は、前記第1のインバータ回路の入力端子と電気的に接続されている撮像装置。 - 請求項1において、
さらに第5のトランジスタと、第6のトランジスタと、第7のトランジスタと、を有し、
前記第5のトランジスタのソースまたはドレインの一方は、前記第1のトランジスタのソースまたはドレインの他方と電気的に接続され、
前記第5のトランジスタのソースまたはドレインの一方は、前記第6のトランジスタのゲートと電気的に接続され、
前記第6のトランジスタのソースまたはドレインの一方は、前記第7のトランジスタのソースまたはドレインの一方と電気的に接続され、
前記第6のトランジスタのソースまたはドレインの一方は、前記第5のトランジスタのゲートと電気的に接続されている撮像装置。 - 請求項6において、
前記第6のトランジスタと、前記第5のトランジスタおよび前記第7のトランジスタとは、極性が逆である撮像装置。 - 請求項1において、
前記CMOS回路が有するn-ch型トランジスタは、チャネル形成領域に金属酸化物を有する撮像装置。 - 請求項1または8において、
前記金属酸化物は、Inと、Znと、M(MはAl、Ti、Ga、Sn、Y、Zr、La、Ce、NdまたはHf)と、を有する撮像装置。 - 請求項1において、
前記CMOS回路が有するn-ch型トランジスタは、第1のゲートと、第2のゲートと、を有し、
前記第1のゲートと、前記第2のゲートとは、半導体層を介して対向する位置に設けられている撮像装置。 - 請求項1において、
前記光電変換素子は、セレンまたはセレンを含む化合物を有する撮像装置。 - 請求項1乃至11のいずれか一に記載の撮像装置と、スピーカと、を有する電子機器。
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US11848340B2 (en) | 2023-12-19 |
CN110870299A (zh) | 2020-03-06 |
WO2019012370A1 (ja) | 2019-01-17 |
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