Patent · US Active

Modulator for radio-frequency signals

US7728691B2 · kind B2 · utility

1Cited by

1References

23Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Nikolaus Demharter · Dormitz, DE
Philipp Hoecht · Newton, US
Martin Nisznansky · Steinfeld (Oldenburg), DE

Key dates

Filing date	Oct 15, 2008
Grant date	Jun 1, 2010
Priority date	—
Expiry date	Nov 28, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/3607
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A modulator for radio-frequency signals designed an entirely digital modulator has two mixer stages connected in series. The first mixer stage implements with a relatively low first sample rate a frequency mixing with a first oscillator frequency that is adjustable with high precision. The second mixer stage implements a frequency mixing with a significantly higher second sample rate and with a relatively coarsely adjustable second oscillator frequency. The downstream second mixer stage, in the case of a single mixer stage, the mixer stage, has at least two phase accumulators that are incremented with the higher second sample rate but with different incremental values. The output signal of at maximum one of the phase accumulators is evaluated at any point in time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.