# US 2010/0166124 A1 · Digital architecture for radio-frequency apparatus and associated methods

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- Number: US 2010/0166124 A1
- Document ID: US20100166124A1
- Status: Published application
- Kind: A1
- Application number: 12/715,361
- Filed: 2010-03-01
- Published: 2010-07-01
- Earliest claimed: 2001-01-12
- Assignees: Silicon Laboratories Inc.
- Inventors: Richard T. Behrens; Tod Paulus; Mark S. Spurbeck; Vishnu S. Srinivasan; Donald A. Kerth; Jeffrey W. Scott; G. Tyson Tuttle; G. Diwakar Vishakhadatta
- Web page: https://patentgrep.com/patent/US20100166124A1

## CPC

- H04B 1/28: the receiver comprising at least one semiconductor device having three or more electrodes
- H04B 1/0003: {Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain (digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00)}
- H04B 1/38: Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B 1/406: {with more than one transmission mode, e.g. analog and digital modes}
- H04B 15/02: Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B 15/04: the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
- H04B 2215/064: Reduction of clock or synthesizer reference frequency harmonics
- H04B: TRANSMISSION

## Abstract

A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry. The receiver analog circuitry resides within a first integrated circuit and the receiver digital circuitry resides within a second integrated circuit. The second integrated circuit couples to the first integrated circuit via a one-bit digital interface. The receiver analog circuitry receives an RF signal and processes the received RF signal to generate a digital signal. The receiver analog circuitry provides the digital signal to the receiver digital circuitry. The receiver digital circuitry includes a digital down-converter circuitry that mixes the digital signal with an intermediate frequency (IF) local oscillator (LO) signal to generate a digital down-converted signal. The receiver digital circuitry also includes a digital filter circuitry that filters the digital down-converted signal to generate a filtered digital signal.

## Claims

### Claim 1

A receiver digital circuitry, comprising:
digital down-converter circuitry configured to mix a digital input signal provided by a receiver analog circuitry with an intermediate frequency (IF) local oscillator signal to generate a digital down-converted signal; and
digital filter circuitry configured to filter the digital down-converted signal to generate a filtered digital signal,
wherein the receiver analog circuitry resides within a first integrated circuit, and
wherein the receiver digital circuitry resides within a second integrated circuit, and the second integrated circuit couples to the first integrated circuit via a one-bit digital interface.

### Claim 2

A radio-frequency (RF) apparatus, comprising:
a first circuit partition, comprising receiver analog circuitry configured to produce a digital receive signal from an analog radio-frequency signal; and
a second circuit partition, comprising receiver digital circuitry configured to accept the digital receive signal, wherein the first and second circuit partitions are partitioned so that interference effects between the first circuit partition and the second circuit partition tend to be reduced.