Invention Grant
- Patent Title: Digital low frequency correction circuit and method for reducing low frequency disturbances within a digital signal
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Application No.: US16351847Application Date: 2019-03-13
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Publication No.: US10763976B1Publication Date: 2020-09-01
- Inventor: Andrew Schaefer , Andreas Maier , Detlef Schlager
- Applicant: Rohde & Schwarz GmbH & Co. KG
- Applicant Address: DE Munich
- Assignee: ROHDE & SCHWARZ GMBH & CO. KG
- Current Assignee: ROHDE & SCHWARZ GMBH & CO. KG
- Current Assignee Address: DE Munich
- Agency: Westman, Champlin & Koehler, P.A.
- Main IPC: H04B3/466
- IPC: H04B3/466 ; H04B17/00 ; H04B15/00 ; H04B1/16 ; H04L25/03

Abstract:
The invention relates to a digital low frequency correction circuit and a corresponding method for correction of low frequency disturbances within a digital signal, in particular to a reduction of distortions caused by analog circuitry, such as analog signal amplifiers. The low frequency correction circuit comprises a main signal path adapted to delay a digital input signal received by a signal input terminal and at least one correction signal path including a digital correction filter adapted to filter the received digital input signal. Furthermore, an adder of the circuit is adapted to add the digital signal delayed by the main signal path and the digital signal corrected by said correction signal path to generate a digital output signal output by a signal output terminal of the circuit.
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