IP Library › Granted Patent US 7,888,873
Granted Patent B2
US 7,888,873 · App. 12/075,870 · Granted Feb 15, 2011

Dynamic depressed collector

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Quick Facts
Patent No.
US 7,888,873
App. No.
12/075,870
Granted
Feb 15, 2011
Kind
B2
Abstract

A biasing system for use with a multi-stage depressed collector of a high power amplifier includes one or more adjustable power sources. A power controller provides control signals to the power sources depending on the operational RF power level. For low power applications, biasing of collector electrodes is reduced such that savings in energy costs are realized, and operational temperature and wear are reduced. The control signals are based on values stored in a look-up table. For multiple depressed electrodes, biasing can be controlled in tandem or independently.

Claims (7)

1. A biasing system for an electron tube having at least two collector stages, the biasing system comprising:

at least one adjustable power source for biasing an electrode of one of the collector stages;

a power controller having an output for driving the adjustable power source; and

an analog translator for providing appropriate power level inputs to the adjustable power source,

wherein the power controller accesses a look-up table to determine output level.

2. The system of claim 1 , wherein the power controller drives the adjustable power source based on a measurement of RF power in the electron tube.

3. The system of claim 1 , wherein the power controller drives the adjustable power source based on an external signal provided to the power controller.

Assignments (17)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 18, 2025
From: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI INTERNATIONAL, INC.
To: COMMUNICATIONS & POWER INDUSTRIES INTERNATIONAL INC.
Reel/Frame 072051/0554 →
RELEASE OF SECURITY INTEREST Recorded Jun 10, 2024
From: ALTER DOMUS (US) LLC
To: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI SATCOM & ANTENNA TECHNOLOGIES INC.; CPI RADANT TECHNOLOGIES DIVISION INC.; CPI ESSCO INC.
Reel/Frame 067678/0059 →
RELEASE OF FIRST LIEN SECURITY INTEREST (REEL 043349 / FRAME 0881) Recorded Oct 10, 2022
From: UBS AG, STAMFORD BRANCH
To: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI RADANT TECHNOLOGIES DIVISION INC.; ASC SIGNAL CORPORATION; CPI MALIBU DIVISION
Reel/Frame 061639/0044 →
RELEASE OF SECOND LIEN SECURITY INTEREST (REEL 043349 / FRAME 0916) Recorded Oct 10, 2022
From: UBS AG, STAMFORD BRANCH
To: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI RADANT TECHNOLOGIES DIVISION INC.; ASC SIGNAL CORPORATION; CPI MALIBU DIVISION
Reel/Frame 061639/0054 →
SECURITY AGREEMENT Recorded Oct 7, 2022
From: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI SATCOM & ANTENNA TECHNOLOGIES, INC.; CPI RADANT TECHNOLOGIES DIVISION INC.; CPI ESSCO INC.
To: ALTER DOMUS (US) LLC, AS COLLATERAL AGENT
Reel/Frame 061623/0543 →
FIRST LIEN PATENT SECURITY AGREEMENT Recorded Jul 26, 2017
From: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI RADIANT TECHNOLOGIES DIVISION INC.; ASC SIGNAL CORPORATION; CPI MALIBU DIVISION
To: UBS AG, STAMFORD BRANCH
Reel/Frame 043349/0881 →
RELEASE OF SECURITY INTEREST Recorded Jul 26, 2017
From: UBS AG, STAMFORD BRANCH
To: COMMUNICATIONS & POWER INDUSTRIES LLC; ASC SIGNAL CORPORATION; CPI MALIBU DIVISION; CPI RADIANT TECHNOLOGIES DIVISION INC.
Reel/Frame 043349/0649 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Jul 26, 2017
From: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI RADIANT TECHNOLOGIES DIVISION INC.; ASC SIGNAL CORPORATION; CPI MALIBU DIVISION
To: UBS AG, STAMFORD BRANCH
Reel/Frame 043349/0916 →
RELEASE OF SECURITY INTEREST Recorded Jul 26, 2017
From: UBS AG, STAMFORD BRANCH
To: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI MALIBU DIVISION; CPI LOCUS MICROWAVE, INC.; CPI RADIANT TECHNOLOGIES DIVISION INC.; ASC SIGNAL CORPORATION
Reel/Frame 043358/0573 →
SECOND LIEN SECURITY AGREEMENT Recorded Mar 21, 2017
From: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI MALIBU DIVISION; CPI LOCUS MICROWAVE, INC.; CPI RADANT TECHNOLOGIES DIVISION, INC.; ASC SIGNAL CORPORATION
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 042050/0862 →
RELEASE OF 2ND LIEN SECURITY INTEREST Recorded Mar 21, 2017
From: CORTLAND CAPITAL MARKET SERVICES LLC
To: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI MALIBU DIVISION; CPI RADANT TECHNOLOGIES DIVISION, INC.
Reel/Frame 042045/0348 →
SECOND LIEN PATENT SECURITY AGREEMENT Recorded Sep 25, 2015
From: COMMUNICATIONS & POWER INDUSTRIES LLC; CPI MALIBU DIVISION; CPI RADANT TECHNOLOGIES DIVISION, INC.
To: CORTLAND CAPITAL MARKET SERVICES LLC, AS COLLATERAL AGENT
Reel/Frame 036687/0467 →
SECURITY INTEREST Recorded Apr 11, 2014
From: COMMUNICATIONS & POWER INDUSTRIES LLC, AS PLEDGOR; CPI MALIBU DIVISION, AS PLEDGOR; CPI RADANT TECHNOLOGIES DIVISION INC., AS PLEDGOR
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 032657/0219 →
RELEASE OF SECURITY INTEREST Recorded Apr 9, 2014
From: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
To: COMMUNICATIONS & POWER INDUSTRIES LLC, AS PLEDGOR; CPI MALIBU DIVISION, AS PLEDGOR
Reel/Frame 032636/0223 →
CERTIFICATE OF CONVERSION Recorded Apr 2, 2014
From: COMMUNICATIONS & POWER INDUSTRIES, INC.
To: COMMUNICATIONS & POWER INDUSTRIES LLC
Reel/Frame 032591/0676 →
SECURITY AGREEMENT Recorded Feb 22, 2011
From: COMMUNICATIONS & POWER INDUSTRIES LLC (FKA COMMUNICATIONS & POWER INDUSTRIES, INC); CPI MALIBU DIVISION (FKA MALIBU RESEARCH ASSOCIATES)
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 025830/0037 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 17, 2008
From: CASCONE, MICHAEL J.; LAZAR, JOHN ARTHUR, JR.; OVERSTREET, JOHN BRINSON
To: COMMUNICATIONS AND POWER INDUSTRIES, INC.
Reel/Frame 021107/0420 →