Analog signal converter and mobile communication system using the same
AssigneeKawasaki Microelectronics, Inc.
InventorsNobukazu Mihara, Izumi Hayashibara
Life of this patent
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Abstract
An encoding circuit sequentially encodes digital signals supplied in time series from a digital signal source and then transfers the encoded signals. A decoding circuit sequentially receives the encoded digital signals transferred from the encoding circuit and then decodes the signals. A digital-analog converter sequentially converts the digital signals decoded by the decoding circuit into analog signals. Thus, power consumed when the digital signal output from the digital circuitry is transferred to the analog circuitry is reduced.
Claims11
An analog signal converter comprising:
- an encoding circuit that sequentially encodes digital signals supplied in time series;
- a decoding circuit that sequentially decodes the digital signals encoded by the encoding circuit;
- and
- a digital-analog converter that sequentially converts the digital signals decoded by the decoding circuit into analog signals.
An analog signal converter for converting digital signals into analog signals, the analog signal converter including digital circuitry and analog circuitry, comprising:
- a digital modulator that modulates digital signals into modulated digital signals in a predetermined frequency band used in communication;
- a digital filter that extracts filtered digital signals in the predetermined frequency band from the modulated digital signals;
- an encoding circuit that sequentially encodes the filtered digital signals output from the digital filter;
- a decoding circuit that sequentially decodes the encoded digital signals;
- and
- a digital-analog converter that sequentially converts the decoded digital signals into analog signals.
A mobile communication system using an analog signal converter for sequentially encoding digital signals supplied in time series, sequentially decoding the encoded digital signals, and sequentially converting the decoded digital signals into analog signals.
Dependencies are inferred from the claim text.