Cordless telephone

• US 20020094828A1
• Filed: 06/05/2001
• Published: 07/18/2002
• Est. Priority Date: 01/12/2001
• Status: Abandoned Application

• Current Assignee: CHAW Khong Technology Company Limited
• Original Assignee: CHAW Khong Technology Company Limited
• Inventors: Tang, Cantus Chin Chang
• Application Number:
  US09/873,255
• Publication Number:
  US 20020094828A1
• Time in Patent Office: Days
• US Class Current: 455/462
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H04M 1/03 Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
• CPC Class Codes: H04M 1/20 Arrangements for preventing acoustic feed-back H04M1/62 takes precedence
• CPC Class Codes: H04M 1/6041 Portable telephones adapted for handsfree use
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 1/72502 with one base station connected to a single line

Abstract

A cordless telephone is provided in which the height of handset is reduced to be substantially the same as that of keypad, resulting in a reduction of size and weight of handset thus enabling to be placed in a small space such as pocket of clothing for ease of calling in a hands-free manner; receiver is enclosed by and installed at a predetermined location of antenna; and transmitter is formed on the back of housing of handset opposite to keypad for prolonging the audio feedback path between receiver and transmitter, resulting in a substantially total elimination of audio feedback caused by the height reduction of handset.

Claims

1. A cordless telephone having a handset comprising a housing, a circuit in said housing, an antenna on said housing, a receiver, a keypad on said front side of said housing, and a transmitter on a predetermined position of said housing, characterized in that said receiver is provided at a predetermined location of said antenna.

2. The cordless telephone of claim 1, wherein said circuit comprises a high frequency modulation circuit for receiving signals from the antenna, a transmitter audio frequency amplification circuit for transmitting audio signals to the transmitter, a decoder, a micro processor control unit, an encoder and a receiver audio frequency amplification circuit for receiving audio signals from receiver.

3. The cordless telephone of claim 2, wherein said receiver comprises a receiver audio frequency amplification circuit and further comprising two leads extended from said receiver to couple to said receiver audio frequency amplification circuit of said receiver.

4. The cordless telephone of claim 1, wherein said transmitter is on said rear side of said housing.

5. The cordless telephone of claim 1, wherein the height of said handset is substantially the same as that of said keypad.

6. The cordless telephone of claim 1, wherein said handset is removable from said cordless telephone at a predetermined distance while maintaining an electrical connection therebetween.

7. The cordless telephone of claim 2, wherein said receiver comprises a receiver audio frequency amplification circuit and further comprising a lead extended from said receiver to couple to said receiver audio frequency amplification circuit of said receiver, and an other lead being connected to said high frequency modulation circuit and at a junction of said other lead a printed circuit micro strip being connected to a ground.

8. The cordless telephone of claim 1, wherein said receiver is provided at an upper portion of said antenna.

9. The cordless telephone of claim 1, wherein said receiver is mounted on a middle portion of said antenna.