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US 2006/0187100 A1Published application
Multiple input analog-to-digital conversion apparatus and radio receiver using the same
AssigneeKabushiki Kaisha Toshiba
InventorsDaisuke Kurose, Takafumi Yamaji, Tetsuro Itakura
Life of this patent
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Abstract
A multiple input AD conversion apparatus includes a first unit AD converter including a plurality of first conversion stages connected in cascade to convert a first analog input signal to a first digital output signal, a second unit AD converter including a plurality of second conversion stages connected in cascade to convert a second analog input signal to a second digital output signal, and an operational amplifier shared between the first conversion stage and the second conversion stage in a time sharing.
Claims12
A radio receiver comprising:
- an antenna to receive a radio wave and output a RF received signal;
- an orthogonal demodulator to demodulate the RF received signal into a first baseband signal and a second baseband signal orthogonal to each other using a first local signal and a second local signal orthogonal to each other;
- and
- a multiple input AD conversion apparatus
- a first unit AD converter including a plurality of first conversion stages connected in cascade to convert the first baseband signal into a first digital output signal;
- a second unit AD converter including a plurality of second conversion stages connected in cascade to convert the second baseband signal into a second digital output signal;
- and
- a plurality of operational amplifiers each configured to be shared between a corresponding first conversion stage of the first conversion stages and a corresponding second conversion stage of the second conversion stages in a time sharing.
5 more elements
A radio receiver comprising:
- first and second antennas which receive radio waves and output first and second RF received signals respectively;
- first and second frequency converters which convert the first and second RF received signals into a first baseband signal and a second baseband signal respectively, using local signals;
- and
- a multiple input AD conversion apparatus comprising:
- a first unit AD converter including a plurality of first conversion stages connected in cascade to convert the first baseband signal to a first digital output signal;
- a second unit AD converter including a plurality of second conversion stages connected in cascade to convert the second baseband signal to a second digital output signal;
- and
- a plurality of operational amplifiers each configured to be shared between a corresponding first conversion stage of the first conversion stages and a corresponding second conversion stage of the second conversion stages in a time sharing.
5 more elements
A radio receiver comprising:
- an antenna to receive a radio wave and output a RF received signal;
- an orthogonal demodulator to demodulate the RF received signal into a first baseband signal and a second baseband signal orthogonal to each other using a first local signal and a second local signal orthogonal to each other;
- and
- a multiple input AD conversion apparatus comprising:
- a first unit AD converter including a plurality of first conversion stages connected in cascade to convert the first baseband signal to a first digital output signal;
- a second unit AD converter including a plurality of second conversion stages connected in cascade to convert the second baseband signal to a second digital output signal;
- and
- a plurality of operational amplifiers each configured to be shared between a corresponding first conversion stage of the first conversion stages and a corresponding second conversion stage of the second conversion stages in a time sharing.
5 more elements
A radio receiver comprising:
- first and second antennas which receive radio waves and output first and second RF received signals respectively;
- first and second frequency converters which convert the first and second RF received signals into first and second baseband signals respectively, using local signals;
- and
- a multiple input AD conversion apparatus comprising:
- a first unit AD converter including a plurality of first conversion stages connected in cascade to convert the first baseband signal to a first digital output signal;
- a second unit AD converter including a plurality of second conversion stages connected in cascade to convert the second baseband signal to a second digital output signal;
- and
- a plurality of first operational amplifiers each configured to be shared between a corresponding first conversion stage of the first conversion stages and a corresponding second conversion stage of the second conversion stages in a time sharing.
5 more elements
Dependencies are inferred from the claim text.