Method and apparatus for coupling an ECL output signal using a clamped capacitive bootstrap circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 25, 1991
Issued Date -
N/A
app pub date -
May 9, 1990
filing date -
Nov 17, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for providing ECL output signals to a capacitative load includes differential amplification of input signals with a first output of a differential amplifier connected for establishing a voltage level between voltage limits V.sub.cc and V.sub.ee at the output of an output driver in response to variations in the first amplifier output. A pull-down transistor has a collector connected to the output driver output, an emitter connected to the V.sub.ee voltage source, and a base coupled through a boost capacitor to the second amplifier output. A voltage clamp embracing a clamp transistor with a base connected to receive a predetermined control voltage has an emitter connected to the boost capacitor and the pull-down transistor base and a collector connected to the V.sub.cc voltage source. The clamp transistor is operated in Darlington configuration to provide a minimum discharge impedence to the base of the pull-down transistor. A recovery capacitor is connected between the clamp transistor base and the first duplifier output to speed up the clamp transistor's operation.
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