Digital calibration type analog-to-digital converter and wireless receiver circuit and wireless transceiver circuit using the same

A wireless receiver circuit comprising:

• at least one digital calibration type analog-to-digital converter,
• wherein the respective digital calibration type analog-to-digital converter includes a first analog-to-digital conversion unit, a second analog-to-digital conversion unit, a digital calibration section that calibrates outputs from the first analog-to-digital conversion unit, and a switching control section that is controlled by identification information,
• wherein the first analog-to-digital conversion unit corresponds to a high sample rate at low precision and the second analog-digital conversion unit corresponds to a low sample rate at high precision,
• wherein, when the identification information indicates a state of receiving high-data rate signals, the switching control section operates the first analog-to-digital conversion unit, the second analog-to-digital conversion unit, and the digital calibration section so as to perform the analog-to-digital conversion, and
• wherein, when the identification information indicates a state of receiving low-data rate signals, the switching control section stops operations of the first analog-to-digital conversion unit and the digital calibration section and allows the second analog-to-digital conversion unit to perform the analog-to-digital conversion.

A wireless transceiver circuit comprising:

• a receiver circuit, a transmitter circuit, and a baseband signal processing unit,
• wherein the receiver circuit includes at least one digital calibration type analog-to-digital converter,
• wherein the respective digital calibration type analog-to-digital converter includes a first analog-to-digital conversion unit, a second analog-to-digital conversion unit, a digital calibration section that calibrates outputs from the first analog-to-digital conversion unit, and a switching control section that is controlled by the identification information,
• wherein the first analog-to-digital conversion unit corresponds to a high sample rate at low precision and the second analog-digital conversion unit corresponds to a low sample rate at high precision,
• wherein the identification information corresponds to kinds of received signals or data rate and a data length,
• wherein, when the identification information indicates a state of receiving high-data rate signals, the switching control section operates the first analog-to-digital conversion unit, the second analog-to-digital conversion unit, and the digital calibration section so as to perform analog-to-digital conversion,
• wherein, when the identification information indicates a state of receiving low-data rate signals, the switching control section stops operations of the first analog-to-digital conversion unit and the digital calibration section and allows the second analog-to-digital conversion unit to perform the analog-to-digital conversion.