Pocket transceiver

• US 5,033,109 A
• Filed: 02/13/1989
• Issued: 07/16/1991
• Est. Priority Date: 07/01/1988
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Kawano, Minori, Ono, Hideyo
• Primary Examiner(s): KUNTZ, CURTIS A
• Application Number:
  US07/309,153
• Time in Patent Office: 883 Days
• Field of Search: 455/89, 455/90, 455/99, 455/127, 455/343, 455/346
• US Class Current: 455/575.9
• CPC Class Codes: H04B 1/3877 Arrangements for enabling portable transceivers to be used in a fixed position, e.g. cradles or boosters
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A pocket transceiver can be, for example a portable wireless telephone apparatus small enough to be put into a pocket of a user. The apparatus operates at a low power level. The pocket transceiver as an independent unit only handles signals at a low power level and is suitable for communication over close range. The pocket transceiver can also be used as a telephone apparatus for communication over long range, such as a mobile transceiver in a vehicle, by being connected to an adapter, which includes a power amplifier and a power controller for selecting an output power level out of multiple levels in response to an instruction from a transmitting-receiving unit of the pocket transceiver.

Claims

1. A portable transceiver apparatus comprising:

a transceiver body including means for transmitting and receiving communication signals, input means for supplying communication signals to be transmitted, output means for outputting received communication signals, and internal power supply means for supplying power to said means for transmitting and receiving, and said input and output means, said means for transmitting and receiving communication signals including a control portion outputting communication signals at a level fixed to a specified lowest output level out of a plurality of levels, a transmitter filter connected with the control portion directly by separable connection terminals, and a receiver filter connected with the control portion directly via other separable connection terminals; and

an adapter to be detachably connected to said transceiver body, including amplifying means for amplifying signals to be transmitted from said control portion through said terminals which are detached from the transmitter and receiver filters when the adapter is connected to said portable transceiver body, control means responsive to a control signal from said control portion for setting the gain of said amplifying means to one level out of a plurality of levels, means for coupling signals from said amplifying means to an external antenna, and means for coupling signals from said external antenna to said means for transmitting and receiving.

2. A portable transceiver apparatus according to claim 1, wherein said means for transmitting and receiving includes, within said transceiver body, an internal antenna to be connected in circuit with said means for transmitting and receiving upon detachment of said adapter from said transceiver body.

3. A portable transceiver apparatus according to claim 2, wherein said means for coupling the signals to said external antenna includes a transmitter filter, said means for coupling the signals to said means for transmitting and receiving includes a receiver filter, and said transceiver body includes a transmitter filter and a receiver filter between said means for transmitting and receiving and said internal antenna.

4. A portable transceiver apparatus according to claim 3, wherein said transceiver body is further constituted of connection means for putting said transmitter filter and said receiver filter included thereof into either an open state and/or a closed state upon attachment of said adapter to said transceiver body.

5. A portable transceiver apparatus according to claim 4, wherein said connection means includes matching circuits for said antenna.

6. A portable transceiver apparatus according to claim 1, wherein said adapter further includes charging means for charging said internal power supply means when said adapter is attached to said transceiver body.

7. A portable transceiver apparatus according to claim 6, wherein said charging means is coupled with a power supply mounted on a motor vehicle.

8. A portable transceiver apparatus according to claim 1, wherein said input means is a microphone.

9. A portable transceiver apparatus according to claim 1, wherein said output means is a speaker.

10. A portable transceiver apparatus according to claim 1, wherein said control portion is a microprocessor.

11. The apparatus of claim 1, wherein said adapter and transceiver body are detachably connected to each other.

12. The apparatus of claim 1, wherein said specified lowest level is about 6 mW.

13. A communication method using a wireless telephone comprising the steps of:

(a) providing a portable transceiver body including a transceiver for transmitting and receiving communication signals wherein an output level of the transmitting signal is always the lowest power level out of a plurality of power levels,

(b) providing an adapter which is detachably attachable to said portable transceiver body, and includes an amplifier for amplifying the output power of transmitter signals from said portable transceiver body and an antenna for transmitting communication signals at a power level higher than said lowest power level,

(c) attaching said adapter to said portable transceiver body for performing communication over long range, and

(d) using said portable transceiver body as an independent unit without the adapter for performing communication over close range.

14. The method of claim 13, wherein said transceiver body includes a transmitter filter and a control portion directly connected to each other by detachable connection terminals.

15. The method of claim 14, wherein said transceiver body includes a receiver filter directly connected with the control portion by other detachable connection terminals.

16. The method of claim 13 wherein said output level is about 6 mW.

17. A communication method using a wireless apparatus which can send signals over short and long ranges comprising the steps of:

(a) providing a portable transceiver body including a transceiver for transmitting and receiving wherein an output level of the transmitting signal is always the lowest power level out of a plurality of the transmitting signals, the body transceiver including a transmitter and receiver filter and a control portion directly connected to the transmitter and receiver filters by detachable connection terminals, the transceiver body further including means for detachably connecting to an adapter; and

(b) using the portable transceiver body independently without the adapter for communicating over a short range.

18. The method of claim 17 further comprising the steps of:

(c) attaching the adapter to the transceiver body; and

(d) using the portable transceiver body for communicating over a long range.