Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1998-02-23
1999-08-10
Sterrett, Jeffrey
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
H04L 2502
Patent
active
059363932
ABSTRACT:
A line driver comprising a first transistor (M1), a first operational transconductance amplifier (A1) and a reference resistor (10) for converting an input voltage (Vin) to a first current (i1) through the first transistor (M1). A second current i2=n*i1 flows through a second transistor (M2) which forms a 1:n current mirror with the first transistor (M1). The current i2 flows to a load (6), if so required via a transmission line (TL). The impedance of the load (6) is equal to the characteristic impedance RL of the transmission line (TL). Thus, the impedance seen by the line driver is equal to RL. A second operational transconductance amplifier (A2) counteracts reflected signals in the output signal (Vout) caused by mismatch between the output impedance of the current mirror (M1, M2) and the impedance seen by the line driver.
REFERENCES:
patent: 4853609 (1989-08-01), Numata et al.
patent: 5021730 (1991-06-01), Smith
patent: 5266887 (1993-11-01), Smith
patent: 5510751 (1996-04-01), Nauta
patent: 5519309 (1996-05-01), Smith
patent: 5585763 (1996-12-01), Navabi et al.
patent: 5694033 (1997-12-01), Wei et al.
Biren Steven R.
Sterrett Jeffrey
U.S. Philips Corporation
LandOfFree
Line driver with adaptive output impedance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Line driver with adaptive output impedance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line driver with adaptive output impedance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1123281