Comparator with extended common-mode input voltage range
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 6, 1990
Grant Date -
N/A
app pub date -
Apr 20, 1988
filing date -
Apr 21, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A comparator comprising two differential input stages (Q1 to Q4 and Q5 to Q8) which are connected in parallel and fed by a common constant circuit source (Q.sub.B) whose current is passed either to both or only to the one or only to the other differential input stage, depending on whether the common-mode input voltage of the comparator is within, above or below a voltage range that is between the voltage values of the two poles (VC, VE) of a supply voltage source (B) of the comparator, and comprising a common current mirror circuit (Q9, Q10) which is associated with the outputs of both differential input stages and from which the comparator output signal is derived. At least one (Q1 to Q4) of the two differential input stages operates in common-base connection, with this differential input stage (Q1 and Q4) receiving its supply current from the common-mode input voltage source.
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