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1. 发明授权

US5066951A Circuit arrangement for adjusting the triggering point of an inductive keyboard 失效
标题翻译：用于调整电感键盘的触发点的电路布置
公开(公告)号：US5066951A
公开(公告)日：1991-11-19
申请号：US426893
申请日：1989-10-24
申请人： Horst Munster , Hans-Jurgen Wendt
发明人： Horst Munster , Hans-Jurgen Wendt
IPC分类号： H03K17/14 , H03K17/972
CPC分类号： H03K17/14 , H03K17/972 , H03K2017/9706
摘要： The present invention is directed to a circuit arrangement for adjustment of the triggering point of the keys in an inductive keyboard. The keyboard consists essentially of a printed circuit board designed in a matrix-like manner, comprising coils superimposed upon each other, into which a ferrite pin plunges when a key is actuated. By the cooperation of a pulse generator with a current switch which can be influenced through control lines, said cooperation being controllable by a microcomputer, a current pulse is coupled from one coil to another coil and is recognized as a readout signal by a controllable readout amplifier and is conducted further to a central unit. The adjustment of the triggering point of the keys is accomplished by varying the steepness of the driving current pulse, for example, by means of a blocking time duration in the charging of a capacitor determined only once, which durations are stored in a table of values, or it is derived from the fundamental interlinked signals of the keys.
摘要翻译：本发明涉及一种用于调整感应式键盘中的键的触发点的电路装置。键盘基本上由以矩阵状的方式设计的印刷电路板组成，包括彼此重叠的线圈，当钥匙被致动时，铁氧体针头会突出。通过脉冲发生器与可以通过控制线影响的电流开关的协调，所述协作可由微型计算机控制，电流脉冲从一个线圈耦合到另一个线圈，并被可控读出放大器识别为读出信号并进一步向中央单位进行。键的触发点的调整是通过改变驱动电流脉冲的陡度来实现的，例如通过在仅确定一次的电容器的充电中的阻塞持续时间，将该持续时间存储在值表中，或者它是从键的基本相互连接的信号导出的。

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