Mixing stage, modulator circuit and a current control circuit

US9673845B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Saverio Trotta · Hersbruck, DE
• Herbert Knapp · Munich, DE

Key dates

• Filing date: May 13, 2015
• Grant date: Jun 6, 2017
• Expiry date: May 13, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03D7/1491
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A mixing stage includes a first modulation stage that receives an input signal from a first common node of the mixing stage, a first local oscillator input that receives a local oscillator signal, and a first modulation signal output adapted to provide a first modulated signal. A second modulation stage of the mixing stage includes a second input that receives a phase inverted representation of the input signal from a second common node of the mixing stage, a second local oscillator input that receives the local oscillator signal, and a second modulation signal output adapted to provide a second modulated signal. A current generation circuit provides a supply current to the first common node and to the second common node. A current control circuit is adapted to superimpose an offset current to the current of at least one node of the first common node and the second common node.