Dual slope temperature dependent oscillator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 6, 2007
Grant Date -
N/A
app pub date -
May 14, 2004
filing date -
Jun 27, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An oscillator circuit (100) can provide a dual slop temperature response. For a lower temperature range, a capacitor (106) can be charged and/or discharged according to a first current source (302) that provides an essentially constant current source. For a higher temperature range, the capacitor (106) can be charged and/or discharged according to a second current source (304) that can be enabled and/or provide current according to a voltage proportional to absolute temperature. A slightly positive temperature coefficient of a first current source (302) can be offset by a threshold detect circuit (210 and 212) within a second comparator circuit (204) that utilizes the threshold voltage (Vt) of a transistor (212) as a low limit for a capacitor voltage.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully