JP6855668B2 - 不揮発性メモリを伴うランダム符号発生器 - Google Patents
不揮発性メモリを伴うランダム符号発生器 Download PDFInfo
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Description
Claims (10)
- 複数のディフェレンシャルセルを含むディフェレンシャルセルアレイであって、前記複数のディフェレンシャルセルのうちの第1のディフェレンシャルセルが、第1の選択トランジスタと、第1の記憶素子と、第2の記憶素子とを含み、前記第1の選択トランジスタの第1のソース/ドレイン端子が、第1のソース線に接続され、前記第1の選択トランジスタのゲート端子が、第1のワード線に接続され、前記第1の記憶素子が、前記第1の選択トランジスタの第2のソース/ドレイン端子と、第1の制御線対の第1の副制御線との間で接続され、前記第2の記憶素子が、前記第1の選択トランジスタの前記第2のソース/ドレイン端子と、前記第1の制御線対の第2の副制御線との間で接続される、ディフェレンシャルセルアレイと、
登録信号およびフィードバック信号を受信する電源回路と、
第1の選択信号を受信する第1の選択回路であって、前記電源回路の出力端子と、前記第1のディフェレンシャルセルとに接続される第1の選択回路と、
前記電源回路の前記出力端子からのセル電流を検出するための電流判定回路と、
を備えるランダム符号発生器であって、
前記登録信号がアクティブ化され、前記第1のディフェレンシャルセルについて登録が実行されるとき、前記電源回路が、登録電圧を提供し、前記登録電圧が、前記第1の選択回路を通して、前記第1のディフェレンシャルセルの前記第1の記憶素子および前記第2の記憶素子に送信されることで、前記セル電流が生成され、
前記セル電流の大きさが、指定の電流値よりも高い場合、前記電流判定回路が、前記フィードバック信号をアクティブ化し、これにより、前記電源回路が、前記登録電圧の提供を停止する、
ランダム符号発生器。 - 前記ランダム符号発生器は、読取り回路を更に備え、
前記読取り回路が、前記第1の制御線対の前記第1の副制御線および前記第2の副制御線に接続され、
読取りサイクル中に、前記第1の記憶素子および前記第2の記憶素子に読取り電圧が提供され、かつ、前記第1のディフェレンシャルセルについて読取り動作が実行され、これにより、前記第1の記憶素子および前記第2の記憶素子により、それぞれ第1の読取り電流および第2の読取り電流が生成され、前記第1の読取り電流および前記第2の読取り電流が、それぞれ、前記第1の副制御線および前記第2の副制御線を通して、前記読取り回路に送信され、前記読取り回路が、前記第1の読取り電流および前記第2の読取り電流に応じて出力データを生成し、前記出力データが、1ビットのランダム符号として使用される、
請求項1に記載のランダム符号発生器。 - 前記読取り回路が、
第1の電流入力端子および第2の電流入力端子を有する電流比較器、ならびに
前記第1の副制御線、前記第2の副制御線、前記第1の電流入力端子および前記第2の電流入力端子に接続される第2の選択回路を含み、
前記読取りサイクル中に、前記読取り電圧が、前記第1のソース線に提供され、かつ、前記読取り動作が、前記第1のディフェレンシャルセルについて実行され、前記電流比較器が、第2の選択信号に応じて、前記第1の副制御線を前記第1の電流入力端子に接続し、かつ、前記第2の副制御線を前記第2の電流入力端子に接続し、前記電流比較器が、前記第1の読取り電流および前記第2の読取り電流に応じて前記出力データを生成し、前記出力データが、1ビットのランダム符号として使用される、請求項2に記載のランダム符号発生器。 - 前記第1の選択回路が、前記第1の制御線対に接続され、前記登録信号がアクティブ化され、前記第1のディフェレンシャルセルについて前記登録が実行されるとき、前記第1のソース線が、接地端子に接続され、かつ、前記第1の選択回路が、前記第1の選択信号に応じて、前記電源回路の前記出力端子を前記第1の制御線対に接続し、これにより、前記第1の制御線対が、前記セル電流を生成する、請求項2または3に記載のランダム符号発生器。
- 前記第1の選択回路が、前記第1のソース線に接続され、前記登録信号がアクティブ化され、前記第1のディフェレンシャルセルについて前記登録が実行されるとき、前記第1の制御線対が、接地端子に接続され、かつ、前記第1の選択回路が、前記第1の選択信号に応じて、前記電源回路の前記出力端子を前記第1のソース線に接続し、これにより、前記第1の制御線対が、前記セル電流を生成する、請求項2または3に記載のランダム符号発生器。
- 前記電源回路が、
前記登録信号を受信するためのイネーブル端子および前記フィードバック信号を受信するためのフィードバック端子を有する電力源であって、前記登録信号がアクティブ化されるとき、前記電力源の電圧出力端子が、前記登録電圧を提供し、前記フィードバック信号がアクティブ化されるとき、前記電力源の前記電圧出力端子が、前記登録電圧の提供を停止する、電力源と、
オペアンプであって、前記オペアンプの正入力端子が、前記電力源の前記電圧出力端子に接続される、オペアンプと、
第1のトランジスタであって、前記第1のトランジスタのソース端子が、電源電圧を受信する、第1のトランジスタと、
第2のトランジスタであって、前記第2のトランジスタのドレイン端子が、前記第1のトランジスタのゲート端子およびドレイン端子に接続され、前記第2のトランジスタのゲート端子が、前記オペアンプの出力端子に接続され、前記第2のトランジスタのソース端子が、前記オペアンプの負入力端子に接続される、第2のトランジスタとを含み、
前記第2のトランジスタの前記ソース端子が、前記第1の選択回路に接続される、
請求項1から5のいずれか一項に記載のランダム符号発生器。 - 前記電流判定回路が、
第3のトランジスタであって、前記第3のトランジスタのソース端子が、前記電源電圧を受信し、前記第3のトランジスタのゲート端子が、前記第1のトランジスタの前記ゲート端子に接続される、第3のトランジスタと、
前記第3のトランジスタのドレイン端子と、接地端子との間で接続される抵抗器と、
比較器であって、前記比較器の第1の入力端子が、前記第3のトランジスタの前記ドレイン端子に接続され、前記比較器の第2の入力端子が、基準電圧を受信し、前記比較器の出力端子が、前記フィードバック信号を生成する、比較器とを含む、
請求項6に記載のランダム符号発生器。 - 前記第1の記憶素子が、第1の抵抗記憶素子であり、前記第2の記憶素子が、第2の抵抗記憶素子である、請求項1から7のいずれか一項に記載のランダム符号発生器。
- 前記第1の抵抗記憶素子および前記第2の抵抗記憶素子が、磁気抵抗ランダムアクセスメモリ、相変化ランダムアクセスメモリまたは抵抗ランダムアクセスメモリである、請求項8に記載のランダム符号発生器。
- 前記第1の記憶素子が、第1のP型フローティングゲートトランジスタであり、前記第2の記憶素子が、第2のP型フローティングゲートトランジスタである、請求項1から7のいずれか一項に記載のランダム符号発生器。
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