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:
Apr. 07, 2009
Filed:
Apr. 13, 2006
Applicant:
Dirk Killat, Kirchheim/Teck, DE;
Inventor:
Dirk Killat, Kirchheim/Teck, DE;
Assignee:
Dialog Semiconductor GmbH, Kirchheim/Teck-Nabern, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
Abstract
Circuits and methods to achieve a voltage-to-current converter having low noise and a high linearity are disclosed. In a preferred embodiment the converter has been used as a Gm integrator. The core of the invention is an operational transconductance amplifier (OTA) having additional DC current sources allowing a common mode voltage shift. The feedback currents and output currents are decoupled by means of current mirrors. The feedback currents are higher than the output currents thus allowing lower integration resistor size. A common mode decoupling of input and output has been achieved by current mirrors.