Multiple-mode direct conversion receiver

US6029052A · kind A · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Martin Isberg · Lund, SE
• Bjorn Lindquist · Bjärred, SE
• Peter Jakobsson · Lund, SE
• Jan Celander · Lund, SE
• Kjell Gustafsson · Lund, SE
• Lars Peter Kunkel · Landskrona, SE
• Torsten Carlsson · Lund, SE
• Jacob Mannerstråle · Malmö, SE

Key dates

• Filing date: Jul 1, 1997
• Grant date: Feb 22, 2000
• Expiry date: Jul 1, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/406
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A multiple-mode receiver incorporating direct conversion (processing received signals using intermediate frequencies within the same frequency range as the received signal bandwidth) rather than superheterodyne circuitry, allowing receiver hardware components to be re-used rather than replicated for each band. Various embodiments are disclosed in which low pass filters, mixers, quadrature generators, oscillators, and amplifiers are re-used.