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:
Jun. 04, 2002
Filed:
Mar. 14, 2001
Hendrik Boezen, Nijmegen, NL;
Abraham Klaas Van Den Heuvel, Nijmegen, NL;
Koninklijke Philips Electronics N.V., New York, NY (US);
Abstract
An electronic circuit having first (V ) and second (V ) power supply terminals and comprising a first digital driver (DRV) and a further digital driver (DRV ). The digital drivers (DRV, DRV ) are arranged for driving capacitive loads such as charge pump capacitors (CP , CP ) of a charge pump (CHGP). The first digital driver (DRV) comprises a first field effect transistor (T ) having a source coupled to the first power supply terminal (V ), a drain coupled for driving the first charge pump capacitor (CP ), and a gate; a second field effect transistor (T ) having a source coupled to the second power supply terminal (V ), a drain coupled to the drain of the first field effect transistor (T ), and a gate; a first capacitor (C ) coupled between the gate of the first field effect transistor (T ) and an input terminal (CLK) for receiving a digital input signal (U ); and a second capacitor (C ) coupled between the gate of the second field effect transistor (T ) and the input terminal (CLK). The further digital driver (DRV ) is constructed in a similar way as the digital driver (DRV). DC paths are formed between the gates of field effect transistors (T ) and the supply terminals (V , V ). Owing to the special construction of the digital drivers (DRV, DRV ), there is never a short-circuit current between the digital drivers (DRV, DRV ). As a result, the digital drivers (DRV, DRV ) have a very high power efficiency.