Network control circuit
专利汇可以提供Network control circuit专利检索，专利查询，专利分析的服务。并且PURPOSE: To realize a ringer signal detecting circuit which is not influenced by the dial of a telephone set and is stable by detecting the direction of the electric current to flow at a telephone line in the network control circuit to connect the telephone line and an external signal input output part and disconnect the telephone set.
CONSTITUTION: When a ringer signal is impressed between telephone line connecting terminals L
1 and L
2 , through the telephone set connected to telephone set connecting terminals T
1 and T
2 , a ringer signal electric current flows, when the electric current flows from the terminal L
1 to an L
2 direction, the electric current flows at a light emitting part 2-1 of a photocoupler, when the electric current flows from a terminal L
2 to an L
1 direction, the electric current flows at a light emitting part 3-1 of the photocoupler, and as the result, at light receiving parts 2-2 and 3-2 of the photocoupler, signals (to show electric current) 201 and 202 are obtained. The signals 201 and 202 are waveform-shaped by buffer circuits 7 and 11 and signals 205 and 206 are obtained. When 'and' circuit 12, a signal 207 is obtained. The signal 207 is noise-removed by a resistor 13 and a capacitor 14, waveform-shaped further by a buffer circuit 15 and an output signal 209 of a ringer signal detecting circuit is obtained.
COPYRIGHT: (C)1987,JPO&Japio，下面是Network control circuit专利的具体信息内容。
| 标题 | 发布/更新时间 | 阅读量 |
|---|---|---|
| 一种基于发酵中药的解酒饮品的制备方法 | 2020-05-11 | 838 |
| 一种健身哑铃 | 2020-05-15 | 292 |
| 一种襄麦冬内生青霉菌属真菌及在制备甾体皂苷中的应用 | 2020-05-14 | 431 |
| 一种襄麦冬内生镰刀菌属真菌及在制备甾体皂苷中的应用 | 2020-05-15 | 170 |
| 一种变幅杆式声化学系统辐射声场评价方法 | 2020-05-11 | 683 |
| 一种以黑水虻虫蛹为寄主培育的蛹虫草及其培育方法 | 2020-05-14 | 946 |
| 有线电话与无线电台自动转接器 | 2020-05-12 | 892 |
| 一种芽孢杆菌菌株FJAT-52631产生的脂肽及其制备方法 | 2020-05-12 | 673 |
| 一种基于高性能吸附材料的缓释可降解农药颗粒及其制备方法 | 2020-05-13 | 735 |
| 基于NB-IoT与蓝牙的快递邮筒双模通信系统及其通信控制方法 | 2020-05-12 | 617 |
高效检索全球专利专利汇是专利免费检索,专利查询,专利分析-国家发明专利查询检索分析平台，是提供专利分析，专利查询，专利检索等数据服务功能的知识产权数据服务商。
我们的产品包含105个国家的1.26亿组数据，免费查、免费专利分析。
专利汇分析报告产品可以对行业情报数据进行梳理分析，涉及维度包括行业专利基本状况分析、地域分析、技术分析、发明人分析、申请人分析、专利权人分析、失效分析、核心专利分析、法律分析、研发重点分析、企业专利处境分析、技术处境分析、专利寿命分析、企业定位分析、引证分析等超过60个分析角度，系统通过AI智能系统对图表进行解读，只需1分钟，一键生成行业专利分析报告。
