Radio receiver with switched A-D converter
AssigneeNEC Corporation
InventorHisashi Kondo
Life of this patent
Estimating the term…
Abstract
A radio receiver includes an input device for producing an analog input signal and a receiver for receiving a radio signal to produce an analog received signal. A first switch selects the analog input signal and the analog receiver signal alternately to output a selected analog signal to an A-D converter, and a second switch divides the output of the A-D converter into a digital input signal and a digital received signal. A processor processes the digital received signal and the digital input signal and performs an operation determined based on the digital input signal.
Claims14
A radio receiver comprising:
- input means for inputting an instruction to produce an analog input signal;
- receiving means for receiving a radio signal to produce an analog received signal;
- an analog-to-digital converter;
- selecting means for selecting the analog input signal and the analog received signal alternately to output a selected analog signal to the analog-to-digital converter;
- dividing means for dividing a digital output signal of the analog-to-digital converter into a digital input signal and a digital received signal in synchronization with the selecting means;
- and
- processing means for processing the digital received signal and performing an operation corresponding to the instruction determined based on the digital input signal.
A selective call receiver comprising:
- input means for sensing a touch to produce an analog input signal;
- receiving means for receiving a radio signal to produce an analog received signal;
- first switching means for switching between a first state and a second state according to a switching control signal to select the analog signal and the analog received signal alternately to produce a selected analog signal;
- an analog-to-digital converter for digitizing the selected analog signal to produce a digital selected signal;
- second switching means for switching between the first state and the second state according to the switching control signal to produce a digital input signal and a digital received signal from the digital selected signal;
- translating means for translating the digital input signal to a location of the touch on the input means;
- and
- processing means for detecting an incoming call based on the digital received signal and performing an operation corresponding to the location of the touch.
A control method of a radio receiver comprising an analog-to-digital converter, comprising the steps of:
- a) inputting an instruction to produce an analog input signal;
- b) receiving a radio signal to produce an analog received signal;
- c) selecting the analog input signal and the analog received signal in an alternating sequence to output a selected analog signal to the analog-to-digital converter;
- d) dividing a digital output signal of the analog-to-digital converter into a digital input signal and a digital received signal in the alternating sequence;
- and
- e) performing a receiving operation based on the digital received signal and an operation corresponding to the instruction determined based on the digital input signal.
A control method of a radio receiver, comprising the steps of:
- sensing a touch to produce an analog input signal;
- receiving a radio signal to produce an analog received signal;
- switching between a first state and a second state according to a switching control signal to select the analog output signal and the analog received signal alternately to produce a selected analog signal;
- digitizing the selected analog signal to produce a digital selected signal;
- switching between the first state and the second state according to the switching control signal to produce a digital input signal and a digital received signal from the digital selected signal;
- translating the digital input signal to a location of the touch;
- detecting an incoming call based on the digital received signal;
- and
- performing an operation corresponding to the location of the touch.
Dependencies are inferred from the claim text.