专利汇可以提供Portable information unit专利检索,专利查询,专利分析的服务。并且PURPOSE:To realize a miniature and lightweight portable information unit low in frequency of replacing batteries, by using a semiconductor memory as a recording medium with an acoustic memory function. CONSTITUTION:A sound signal after passing through microphone 2 is amplified by amplifier 3, digitized by A/D converter 4 and stored in semiconductor memory 1, so that the recording operatioin will end. To regenerate the signal, data outputted from memory 1 are converted by D/A converter 5 into an analog signal, which is passed through amplifier 6, thereby driving speaker 7. The address of memory 1 is determined by address counter 8. Once addressing from keyboard 9 is performed, I/O port 10 allows display body 11 to display the address in addition to control such as recording, regeneration and retrieval. When memory 1 uses a semiconductor memory, no latency time is required and the miniaturization and the reduction in power consumption are both realized because of no need of fast-forward and rewind functions.,下面是Portable information unit专利的具体信息内容。
标题 | 发布/更新时间 | 阅读量 |
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一种开关电容式高带宽包络线跟踪电源电路及其控制方法 | 2020-05-08 | 140 |
磁耦合输电系统并联线圈最优切换设计方法 | 2020-05-12 | 70 |
一种可促进牙组织修复的口腔植入式无线供电发光微装置 | 2020-05-12 | 491 |
一种电竞椅椅垫和电竞椅 | 2020-05-12 | 839 |
一种IGBT逆变无气保护焊机 | 2020-05-08 | 505 |
一种叠层结构钻削的实验装置 | 2020-05-12 | 103 |
等半径电磁谐振并联供电线圈设计方法 | 2020-05-13 | 495 |
一种流星余迹自主改频突发调制解调装置 | 2020-05-11 | 316 |
弹性波装置、多工器、高频前端电路以及通信装置 | 2020-05-11 | 858 |
一种物品防丢失搜寻装置 | 2020-05-12 | 755 |
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