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Patent Searching and Data


Title:
COUPLED SAWTOOTH OSCILLATOR
Document Type and Number:
WIPO Patent Application WO1999053609
Kind Code:
A3
Abstract:
Relaxation oscillator comprising a chain of coupled sawtooth generator stages. Each stage has a capacitor which is charged and discharged. The charging of a capacitor begins when the voltage (Cc1) of a previous stage reaches a threshold voltage (VH). To avoid sampling of noise on the threshold voltage (VH) each new voltage ramp is started gradually.

Inventors:
VAN TUIJL ADRIANUS J M
GIERKINK SANDER L J
Application Number:
PCT/IB1999/000571
Publication Date:
January 13, 2000
Filing Date:
April 01, 1999
Export Citation:
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Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
PHILIPS SVENSKA AB (SE)
International Classes:
H03K3/353; H03B5/24; H03K3/354; H03K4/502; H03K4/56; H03K4/90; (IPC1-7): H03K4/501
Foreign References:
US5654677A1997-08-05
Other References:
MICHAEL P. FLYNN ET AL: "A 1.2-mum CMOS Current-Controlled Oscillator", IEEE JOURNAL OF SOLID-STATE CIRCUITS, vol. 27, no. 7, 1992
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