EP0315260A2
Expired / Lapsed
EP
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Cellular telephone apparatus
Assignee: Koninklijke Philips NV
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Filing: 1988-10-28
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Granted: —
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Expires: 2008-10-28
Abstract
Abstract A cellular telephone apparatus in which several functions such as decoding and encoding data signals, detecting the busy/idle bit and transponding the SAT signal, are carried out by a CMOS data processor (20) which is separate from a CMOS micro-controller (34). The data processor (20) can be operated at a lower clock frequency (1.2 MHz) than the micro-controller (34) which enables current to be saved compared to processing these functions in software using the micro-controller.
Inventors
- 👤 Robin C/O Philips Components Sharpe
- 👤 Peter James C/O Philips Components Hart
- 👤 Petrus Paulus C/O Philips Int. B.V. Van De Mortel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 15:47
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; H04W52/0287; H04W52/0293; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
A cellular telephone apparatus comprising a duplex transceiver, a logic unit formed by a data processor and a microcontroller, the data processor being coupled to the transceiver for processing data received by or to be transmitted by the transceiver and the microcontroller being coupled to the data processor for utilising data produced by the data processor in response to a received data stream and for providing data for transmission, a clock generator for supplying a first clock signal to the microcontroller and means for deriving from the first clock signal a second clock signal which is supplied to the data processor, the second clock signal being of lower frequency than, and in synchronism with, the first clock signal.
Claim 2
Dependent Claim
118 words
A cellular telephone apparatus comprising a duplex transceiver, a logic unit formed by a data processor and a microcontroller, the data processor being coupled to the transceiver for processing data received by or to be transmitted by the transceiver and the microcontroller being coupled to the data processor for utilising data produced by the data processor in response to a received data stream and for providing data for transmission, a clock generator for supplying a first clock signal to the microcontroller and means for deriving from the first clock signal a second clock signal which is supplied to the data processor, the second clock signal being of lower frequency than, and in synchronism with, the first clock signal.
Claim 3
Dependent Claim
26 words
An apparatus as claimed in claim 1, wherein said means for deriving the second clock signal comprises a divider for dividing down the first clock signal.
Claim 4
Dependent Claim
39 words
An apparatus as claimed in claim 1, further comprising a local oscillator constituted by a frequency synthesiser connected to the clock generator and said means for deriving the second clock signal comprises a frequency divider in the frequency synthesiser.
Claim 5
Dependent Claim
20 words
An apparatus as claimed in claim 1, 2 or 3, wherein the data processor and the microcontroller are CMOS devices.
Claim 6
Independent Claim
25 words
An apparatus as claimed in any one of claims 1 to 4, wherein the data processor comprises an integrated circuit including analogue and digital circuitry.
Claim 7
Independent Claim
48 words
An apparatus as claimed in any one of claims 1 to 5, wherein the data processor includes means for detecting digitised dotting and word synchronising sequences in received data signals and means for effecting majority voting and error correction of digitised data words comprising the received data signals.
Claim 8
Dependent Claim
29 words
An apparatus as claimed in claim 6, wherein the word synchronising sequence detecting means has means for determining the status of the busy/idle bit in a received data signal.
Claim 9
Independent Claim
33 words
An apparatus as claimed in any one of claims 1 to 5, wherein the data processor includes means for BCH encoding data words supplied by the microcontroller for onward transmission by the transceiver.
Claim 10
Independent Claim
28 words
An apparatus as claimed in any one of claims 1 to 5, wherein the data processor includes means for determining and transponding a supervisory audio tone (SAT) signal.
Claim 11
Independent Claim
34 words
An apparatus as claimed in any one of claims 1 to 9, further comprising an audio processor, said audio processor having a clock input connected to said means for supplying the second clock signal.
Claim 12
Dependent Claim
33 words
An apparatus as claimed in claim 10, wherein the data processor has means for providing a mute function to the audio processor in response to control data being transmitted on a voice channel.
Claim 13
Independent Claim
27 words
An apparatus as claimed in any one of claims 1 to 10, further comprising a I²C control bus interconnecting at least the data processor and the microcontroller.
Claim 14
Dependent Claim
23 words
A cellular telephone apparatus constructed and arranged to operate substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
Claim 15
Dependent Claim
23 words
A cellular telephone apparatus constructed and arranged to operate substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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