The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 2020
Filed:
Feb. 09, 2019
Semtech Corporation, Camarillo, CA (US);
Miguel Valencia, Bristol, GB;
Nikolaos Vogiatzis, Bristol, GB;
Semtech Corporation, Camarillo, CA (US);
Abstract
A circuit controls a dynamic time constant to remove DC offset from a received optical data signal. The circuit has a first capacitor coupled between a first terminal and a second terminal. A first resistance network is coupled between the second terminal and a reference voltage. A control circuit has a first output coupled to a control input of the first resistance network. The control circuit monotonically increases an effective resistance of the first resistance network to increase the dynamic time constant. The first resistance network has a resistor coupled to the second terminal, and a transistor with a first conduction terminal coupled to the resistor, a second conduction terminal coupled to the reference voltage, and a control terminal coupled to the first output of the control circuit. The first capacitor has a variable capacitance. The monotonic increase in the dynamic time constant can be linear or non-linear.