公开(公告)号：US06184805B2

公开(公告)日：2001-02-06

申请号：US09460380

申请日：1999-12-13

Applicant: Johan G. M. Uggmark

Inventor： Johan G. M. Uggmark

IPC: H03M1100

CPC classification number: H03M11/24 ,  H04M1/72519

Abstract: A device for use in an apparatus, preferably a radiotelephone, is equipped with a plurality of keys. Upon activation of a key, the device detects which key has been activated. The device includes a signal generating unit which generates an oscillating signal whose character corresponds to the activated key. A signal detecting unit determines, from the character of the oscillating signal, a digital value which indicates which key has been activated.

Abstract translation: 用于装置，优选无线电话机的装置配备有多个键。 激活密钥后，设备将检测哪个密钥已被激活。 该装置包括信号产生单元，该信号产生单元产生其字符对应于激活的键的振荡信号。 信号检测单元根据振荡信号的字符确定指示哪个键被激活的数字值。

公开(公告)号：US06222466B1

公开(公告)日：2001-04-24

申请号：US08993242

申请日：1997-12-18

Applicant: Johan G. M. Uggmark

Inventor： Johan G. M. Uggmark

IPC: H03M1100

CPC classification number: H03M11/24 ,  H04M1/72519

Abstract: The invention is related to a method and a device for use in an apparatus, preferably a portable radiotelephone, equipped with a number of keys. Upon activation of a key, the device detects which key has been activated. The device comprises a signal generating unit which generates an oscillating signal whose character, e.g. frequency, unambiguously corresponds to the activated key. A signal detecting unit determines from the character of the oscillating signal a digital value which unambiguously indicates which key has been activated. An advantage offered by the invention is that the device can be implemented by use of simpler and cheaper circuits than prior known devices of similar type.

Abstract translation: 本发明涉及一种在装备有便携式无线电话机的设备中使用的方法和设备，该设备配备有多个密钥。 激活密钥后，设备将检测哪个密钥已被激活。 该装置包括信号产生单元，该信号产生单元产生一个振荡信号， 频率明确对应于激活的密钥。 信号检测单元根据振荡信号的字符确定数字值，其明确地指示哪个键已经被激活。 本发明提供的优点在于，可以通过使用比现有的相似类型的装置更简单和更便宜的电路来实现该装置。