Resources Contact Us Home
Browse by Category: Main > Electrical & Energy
Class Information
Number: 330/128
Name: Amplifiers > With control of power supply or bias voltage > Control means for anode of screen grid circuit
Description: Subject matter wherein the "combined control means" is in the circuit from the power supply or bias voltage source means to the anode or screen grid electrode of a vacuum tube amplifying device or in shunt therewith, in such manner, as to control the power supply or bias voltage applied to the anode or screen grid electrode.

Patents under this class:

Patent Number Title Of Patent Date Issued
6961553 Bidirectional distributed amplifier Nov. 1, 2005
6947567 Audio boost circuit Sep. 20, 2005
6927626 Thermal protection system for an output stage of an amplifier Aug. 9, 2005
6489843 Power amplifier and communication unit Dec. 3, 2002
5909145 Variable control of electronic power supplies Jun. 1, 1999
5635872 Variable control of electronic power supplies Jun. 3, 1997
5091700 Amplifier with mains voltage reduction Feb. 25, 1992
4442407 Two loop automatic level control for power amplifier Apr. 10, 1984
4441086 Audio system with orderly shutdown sequence Apr. 3, 1984
4286492 Control for electronic amplifiers Sep. 1, 1981
4277755 Circuit arrangement for driving nonlinear threshold devices Jul. 7, 1981
4196392 Method and apparatus for monitoring and controlling the anode dissipation of transmitters Apr. 1, 1980
4053848 Circuit arrangement for combining high frequency power components Oct. 11, 1977

  Recently Added Patents
Activated carbon cryogels and related methods
Memory controller including a hardware compression and decompression engine for managing system memory and graphical operations
Generating wiki pages from content and transformation objects
Liquid crystal display and method of driving the same
Watch dial
Image processing apparatus, image display apparatus, and image processing method
Systems and methods for vehicle cruise control
  Randomly Featured Patents
Reference standard and method for calibration
Sloping rotatable exerciser
System and method for storing performance-enhancing data in memory space freed by data compression
Gas purification using photocatalytic vortex-suspended particles
Devices and methods for treatment of vascular aneurysms
Air suspension driver's seat
Screen printing apparatus with off contact
Rose pruning and stripping device
Portable, inflatable, one-person vessel for recumbent, weightless, therapeutic flotation
Sports shoe having a detachable ice/roller skate