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Class Information
Number: 330/150
Name: Amplifiers > Cascaded similar amplifying device of different characteristics
Description: Subject matter including at least two stages of amplification (each stage as defined in the class definition and each stage having a vacuum tube amplifying device) such that, the input signal for each stage, except the first, is the output signal of the preceding stage, and wherein at least one of the cascaded amplifying devices has a significant difference in its characteristics such as a difference in the number of electrodes, or where the construction of each of at least two of the tubes is such that there is a difference in the tube characteristics, or where because of differences in biasing or energizing voltages the tube characteristics are different.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7395034 |
Clipping circuit and radio transmitter using the same |
Jul. 1, 2008 |
| 7289575 |
Signal processing means |
Oct. 30, 2007 |
| 7176910 |
Driving circuit for display device |
Feb. 13, 2007 |
| 7106132 |
Feed-forward operational amplifiers and methods of using the same |
Sep. 12, 2006 |
| 7053717 |
Method and apparatus for realizing a low noise amplifier |
May. 30, 2006 |
| 6927628 |
Gain-control method and device for cascaded amplifiers |
Aug. 9, 2005 |
| 6873703 |
Precision, low-power current-sense transmission channel for subscriber line interface circuit, programmable with single ended impedances and capable of exhibiting a voltage sense response |
Mar. 29, 2005 |
| 6861910 |
Multistage amplifier and integrated circuit |
Mar. 1, 2005 |
| 6753727 |
Sequential DC offset correction for amplifier chain |
Jun. 22, 2004 |
| 6750724 |
Multistage amplifier |
Jun. 15, 2004 |
| 6680647 |
Low noise amplifier circuit with phase matched switch topology |
Jan. 20, 2004 |
| 6577187 |
Powered transducer preamplifier with DC level shifting circuit |
Jun. 10, 2003 |
| 6573787 |
Elimination of noise during power supply switching in an audio amplifier circuit |
Jun. 3, 2003 |
| 6566942 |
Multistage amplifier circuit |
May. 20, 2003 |
| 6556077 |
Instrumentation amplifier with improved AC common mode rejection performance |
Apr. 29, 2003 |
| 6532357 |
Radio communication device and transmission power control method for radio communication device |
Mar. 11, 2003 |
| 6480062 |
Reflection amplifier circuit |
Nov. 12, 2002 |
| 6466091 |
High order multi-path operational amplifier with reduced input referred offset |
Oct. 15, 2002 |
| 6380804 |
Method and apparatus for switching stages of a multistage amplifier quickly between operational modes |
Apr. 30, 2002 |
| 6342810 |
Predistortion amplifier system with separately controllable amplifiers |
Jan. 29, 2002 |
| 6342811 |
Integrated power amplifier which allows parallel connections |
Jan. 29, 2002 |
| 6333673 |
Electronic circuit |
Dec. 25, 2001 |
| 6271784 |
Capacitor-based digital-to-analog converter with continuous time output |
Aug. 7, 2001 |
| 6236265 |
Radio station preamplifier circuit with interior and exterior preamplifiers |
May. 22, 2001 |
| 6232836 |
In-line, unbalanced amplifier, predistortion circuit |
May. 15, 2001 |
| 6140870 |
Hybrid thermionic valve and solid state audio amplifier |
Oct. 31, 2000 |
| 6043721 |
Dual band amplifier |
Mar. 28, 2000 |
| 5912585 |
Vacuum tube audio amplifying circuit |
Jun. 15, 1999 |
| 5361039 |
Power amplifier device for a composite signal |
Nov. 1, 1994 |
| 5006814 |
Current amplifier |
Apr. 9, 1991 |
| 4338530 |
Low-pass filter for low-frequency signals |
Jul. 6, 1982 |
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