公开(公告)号：US5025467A

公开(公告)日：1991-06-18

申请号：US151977

申请日：1988-02-03

Applicant: Wayne D. Wheller

Inventor： Wayne D. Wheller

IPC: B06B1/02 ,  H04M19/04

CPC classification number: B06B1/0207 ,  H04M19/04 ,  B06B2201/70

Abstract: An apparatus for producing an audible sound to indicate the occurrence of an incoming telephone call on a cellular telephone. The apparatus has a first circuit for producing a first waveform having a first voltage and a first frequency. The apparatus also has a second circuit for producing a second waveform, the second circuit being operably connected to the first circuit, thereby receiving the first waveform. The second waveform has a second voltage and a second frequency wherein the second frequency is proportional to the first voltage of the first waveform. The apparatus also has an amplifier for amplifying the second waveform to produce an amplified waveform, the amplifier being operably connected to receive the second waveform. The apparatus also has a sound generator for producing an audible sound from the amplified waveform wherein the sound generator is operably connected to receive the amplified waveform. The apparatus further has an enable circuit for enabling the audible sound to be produced in response to the incoming telephone call.

Abstract translation: 一种用于产生可听见的声音的装置，用于指示在蜂窝电话上发生进入的电话呼叫。 该装置具有用于产生具有第一电压和第一频率的第一波形的第一电路。 该装置还具有用于产生第二波形的第二电路，第二电路可操作地连接到第一电路，从而接收第一波形。 第二波形具有第二电压和第二频率，其中第二频率与第一波形的第一电压成比例。 该装置还具有用于放大第二波形以产生放大波形的放大器，该放大器可操作地连接以接收第二波形。 该装置还具有声音发生器，用于从放大的波形产生可听见的声音，其中声音发生器可操作地连接以接收放大的波形。 该装置还具有使电路能够响应于来话电话而产生可听见的声音。