EP0159670A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Radio communication device and method of controlling transmitter output power
Assignee: NEC Corp
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Filing: 1985-04-18
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Granted: —
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Expires: 2005-04-18
Abstract
Abstract A radio communication device comprises a portable communication device and a power amplifier device adapted to accommodating the portable communication device thereinto for amplifying a transmitter output therefrom. The radio communication device further comprises a detector circuit for detecting that an electrical coupling between the portable communication device and the power amplifier device, thereby effecting a control such that the transmitter output power level is kept at a minimum input level required for the power amplifier device. Thus, this can suppress excessive heat generation in the communication device when the portable communication device is used by being accommodated in the power amplifier device.
Inventors
- 👤 Shigeki Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3036; H03G3/3042; H04; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/3877
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
80 words
A radio communication device comprising: first device means provided with a radio transmitter and receiver circuit; second device means adapted to be electrically coupled to said first device means and for amplifying a transmitter output power level therefrom; and detector means for detecting that an electrical coupling between said first and second device means is established, thereby effecting a control such that the transmitter output power level is kept at a minimum input level required for said second device means.
Claim 2
Dependent Claim
80 words
A radio communication device comprising: first device means provided with a radio transmitter and receiver circuit; second device means adapted to be electrically coupled to said first device means and for amplifying a transmitter output power level therefrom; and detector means for detecting that an electrical coupling between said first and second device means is established, thereby effecting a control such that the transmitter output power level is kept at a minimum input level required for said second device means.
Claim 3
Dependent Claim
38 words
A radio communication device as set forth in claim 1, wherein said detector means comprises a connection detector circuit operative to produce information indicative of the establishment of said electrical coupling between said first and second device means.
Claim 4
Dependent Claim
92 words
A radio communication device as set forth in claim 2, wherein said first device means is configured as a radio communication circuit comprising a power amplifier, and an automatic output power control circuit coupled to said power amplifier to control said power amplifier depending upon an output level of said power amplifier, said connection detector circuit being coupled to said automatic output power control circuit, whereby said automatic output power control circuit becomes operative to vary said output level of said power amplifier in accordance with said information from said detector circuit.
Claim 5
Dependent Claim
68 words
A radio communication device as set forth in claim 3, wherein said automatic output power control circuit comprises an output power detector coupled to said power amplifier, a differential amplifier responsive to a difference between the output level of said power detector and a reference voltage, and a control signal converter for converting an output from said differential amplifier into a control signal for controlling said power amplifier.
Claim 6
Dependent Claim
29 words
A radio communication device as set forth in claim 4, wherein said automatic output power control circuit further comprises a reference voltage producing circuit for producing said reference voltage.
Claim 7
Dependent Claim
30 words
A radio communication device as set forth in claim 5, wherein said detector circuit is configured as a circuit for voltage-dividing said reference voltage from said reference voltage producing circuit.
Claim 8
Dependent Claim
29 words
A radio communication device as set forth in any of claims 3 to 7, wherein said first device means is adapted to be removably fitted into said second device.
Claim 9
Dependent Claim
38 words
A radio communication device as set forth in claim 7, wherein said detector means includes a variable resistor and a switch responsive to the establishment of an electrical connection between said radio communication means and said amplifier means.
Claim 10
Dependent Claim
76 words
A radio communication device as set forth in claim 8, wherein said detector means is provided, at said first device means, with a switch element, a contact provided at said switch element, a movable pin, and a first connector and at said second device means with a projection and a second connector, whereby when said first device means is fitted into said second device means, said projection pushes said pin to turn on said switch element.
Claim 11
Dependent Claim
102 words
A radio communication device as set forth in any of claims 7 to 9, wherein said first and second device means are provided with control units which can be mutually communicated with each other, whereby when said control unit is operative to deliver a power-down signal to said reference voltage producing circuit in response to information indicative of establishment of the electrical connection between said first and second device means to turn on a switch element, a control is effected such that an output level of said power amplifier is suppressed to a minimum input level required for said power amplifier means.
Claim 12
Independent Claim
48 words
A method of controlling a transmitter output power level of a radio communication device comprising portable radio communication means provided with a radio transmitter and receiver circuit and power amplifier means adapted to be electrically coupled to said radio communication means and for amplifying a transmitter output therefrom,
Claim 13
Independent Claim
48 words
A method of controlling a transmitter output power level of a radio communication device comprising portable radio communication means provided with a radio transmitter and receiver circuit and power amplifier means adapted to be electrically coupled to said radio communication means and for amplifying a transmitter output therefrom,
Claim 14
Dependent Claim
47 words
the_improvement wherein the method comprises the steps of: detecting that an electrical coupling between said radio communication means and said power amplifier means is established; and effecting a control such that the transmitter output level is suppressed to a minimum level required for said power amplifier means.
Claim 15
Dependent Claim
47 words
the_improvement wherein the method comprises the steps of: detecting that an electrical coupling between said radio communication means and said power amplifier means is established; and effecting a control such that the transmitter output level is suppressed to a minimum level required for said power amplifier means.
References Cited (Backward Citations)
No citation records indexed.
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