초록 ▼

Apparatus, and an associated method, for the IF stage of a receiver, such as the receive portion of a multi-mode mobile station. Direct conversion of an IF-stage receive signal is made into the digital domain through the use of a .SIGMA..DELTA. analog-to-digital converter. Increased portions of the

Apparatus, and an associated method, for the IF stage of a receiver, such as the receive portion of a multi-mode mobile station. Direct conversion of an IF-stage receive signal is made into the digital domain through the use of a .SIGMA..DELTA. analog-to-digital converter. Increased portions of the receiver processes signals in the digital domain using digital-domain circuitry.

대표청구항 ▼

[ We claim:] [1.]1. In a multi-mode radio receiver operable to receive first receive signals generated during operation of a first radio communication system and to receive at least second communication signals generated during operation of at least a second radio communication system, the first rad

[ We claim:] [1.]1. In a multi-mode radio receiver operable to receive first receive signals generated during operation of a first radio communication system and to receive at least second communication signals generated during operation of at least a second radio communication system, the first radio communication system operable within a first frequency bandwidth and the second radio communication system operable within a second frequency bandwidth, an improvement of apparatus for operating upon signals generated during operation of the first radio communication system and signals generated during operation of at least the second communication system, said apparatus comprising:a converter coupled to receive indications of the first receive signals when received at the radio receiver and to receive indications of the at least the second receive signals when received at the radio receiver, said converter for converting the indications received thereat to a first-converted frequency range, selectively to form first-converted first receive signals of the first frequency bandwidth and selectively to form at least first-converted second receive signals of at least the second frequency bandwidth; anda bandpass digitizer coupled to said converter to receive the first-converted first receive signals and the at least the first-converted second receive signals selectively formed by said converter, said bandpass digitizer for generating digitized signals in which noise component portions generated pursuant to digitizing of the first-converted first receive signal and the first-converted second receive signal, once digitized, are shifted in frequency.