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. 27, 2005
Filed:
Nov. 12, 2004
Niall Eric Shakeshaft, Helsinki, FI;
Jussi Heikki Vepsäläinen, Helsinki, FI;
Petri Tapani Eloranta, Espoo, FI;
Pauli Mikael Seppinen, Espoo, FI;
Niall Eric Shakeshaft, Helsinki, FI;
Jussi Heikki Vepsäläinen, Helsinki, FI;
Petri Tapani Eloranta, Espoo, FI;
Pauli Mikael Seppinen, Espoo, FI;
Nokia Corporation, Espoo, FI;
Abstract
An RF transmitter having two digital to RF-conversion devices that combine the D/A conversion function and the upconversion function by a RF-carrier or IF-signal. The device comprises a plurality of parallel unit cells, each of which is a mixer cell type converter having a differential data switch section connected in series to a differential LO-switch pair. The differential LO-switch is further connected in series to a current source. Each unit cell is adapted to receive a control voltage indicative of a data signal value.