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Class Information
Number: 327/308
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Signal converting, shaping, or generating > Amplitude control > Variable attenuator
Description: Subject matter wherein an input signal amplitude is diminished by an adjustable but typically unchanging factor.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7580288 |
Multi-level voltage adjustment |
Aug. 25, 2009 |
| 7554382 |
Method for reducing insertion loss and providing power down protection for MOSFET switches |
Jun. 30, 2009 |
| 7541831 |
Semiconductor memory device for adjusting impedance of data output driver |
Jun. 2, 2009 |
| 7532046 |
Receiver for a differential data bus |
May. 12, 2009 |
| 7532086 |
Digital attenuation apparatus having ultra broadband and excellent attenuation characteristics |
May. 12, 2009 |
| 7525395 |
Step attenuator |
Apr. 28, 2009 |
| 7521980 |
Process and temperature-independent voltage controlled attenuator and method |
Apr. 21, 2009 |
| 7514979 |
De-emphasis system and method for coupling digital signals through capacitively loaded lines |
Apr. 7, 2009 |
| 7508232 |
Data output driver |
Mar. 24, 2009 |
| 7489179 |
Electronic high-frequency switch and attenuator with said high-frequency switches |
Feb. 10, 2009 |
| 7482891 |
Interpolating programmable gain attenuator |
Jan. 27, 2009 |
| 7477085 |
Digital attenuator circuits and methods for use thereof |
Jan. 13, 2009 |
| 7474169 |
Attenuator |
Jan. 6, 2009 |
| 7474170 |
Attenuator |
Jan. 6, 2009 |
| 7453307 |
Process independent voltage controlled logarithmic attenuator having a low distortion and method therefor |
Nov. 18, 2008 |
| 7449976 |
Power efficient PIN attenuator drive circuit |
Nov. 11, 2008 |
| 7439789 |
Systems and methods for controlling termination resistance values for a plurality of communication channels |
Oct. 21, 2008 |
| 7408396 |
High voltage protection circuit |
Aug. 5, 2008 |
| 7378895 |
On-chip electrically alterable resistor |
May. 27, 2008 |
| 7375573 |
De-emphasis system and method for coupling digital signals through capacitively loaded lines |
May. 20, 2008 |
| 7372313 |
Variable impedance circuit and apparatus comprising said variable impedance circuit |
May. 13, 2008 |
| 7365617 |
Wideband attenuator circuits and methods |
Apr. 29, 2008 |
| 7352259 |
Broadband step attenuator with improved time domain performance |
Apr. 1, 2008 |
| 7352226 |
Versatile attenuator |
Apr. 1, 2008 |
| 7345521 |
High frequency switch circuit |
Mar. 18, 2008 |
| 7345556 |
Variable attenuation circuit having large attenuation amount with small circuit size |
Mar. 18, 2008 |
| 7323900 |
Semiconductor memory device for adjusting impedance of data output driver |
Jan. 29, 2008 |
| 7323922 |
Digitally controlled gain stage having an analogue control input |
Jan. 29, 2008 |
| 7304550 |
Wideband attenuator circuits and methods |
Dec. 4, 2007 |
| 7286001 |
High-frequency switching device and semiconductor device |
Oct. 23, 2007 |
| 7268606 |
High-frequency signal switching |
Sep. 11, 2007 |
| 7253700 |
Circuit for controlling a linear-in-decibels attenuator circuit using an analog control signal |
Aug. 7, 2007 |
| 7245170 |
Attenuator and portable telephone terminal apparatus using the same |
Jul. 17, 2007 |
| 7242267 |
Interpolating programmable gain attenuator |
Jul. 10, 2007 |
| 7218892 |
Passive repeater/terminator |
May. 15, 2007 |
| 7205817 |
Analog control integrated FET based variable attenuators |
Apr. 17, 2007 |
| 7199635 |
High-frequency switching device and semiconductor |
Apr. 3, 2007 |
| 7196567 |
Systems and methods for controlling termination resistance values for a plurality of communication channels |
Mar. 27, 2007 |
| 7196566 |
High-resolution variable attenuation device |
Mar. 27, 2007 |
| 7190205 |
Variable resistance circuit |
Mar. 13, 2007 |
| 7176754 |
Control system for the characteristic parameters of an active filter |
Feb. 13, 2007 |
| 7173471 |
High frequency switching circuit and semiconductor device |
Feb. 6, 2007 |
| 7164994 |
Differential termination attenuator network for a measurement probe having an internal termination voltage generator |
Jan. 16, 2007 |
| 7164995 |
Differential termination and attenuator network for a measurement probe |
Jan. 16, 2007 |
| 7162375 |
Differential termination and attenuator network for a measurement probe having an automated common mode termination voltage generator |
Jan. 9, 2007 |
| 7157988 |
Voltage controlled resistor and a controlling method |
Jan. 2, 2007 |
| 7154325 |
Using active circuits to compensate for resistance variations in embedded poly resistors |
Dec. 26, 2006 |
| 7138846 |
Field effect transistor switch circuit |
Nov. 21, 2006 |
| 7135942 |
Interpolating programmable gain attenuator |
Nov. 14, 2006 |
| 7106120 |
PCMO resistor trimmer |
Sep. 12, 2006 |
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