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Class Information
Number: 330/58
Name: Amplifiers > With rotating dynamoelectric amplifying device
Description: Subject matter wherein the amplifying device is provided with a rotating dynamoelectric means; and wherein the power supply electrical energy source which is controlled, may be developed by conversion of mechanical energy to electrical energy by the motion of the armature of the dynamoelectric means, the signal current being applied to magnetic field means of the device, so that a current is generated which varies with the signal current supplied; or the rotating dynamoelectric means may act as a motor with the signal current applied to the rotating means or the field means, and the rotary motion of the device may be utilized as a variable resistor means to effect a control of the power supply source.

Patents under this class:

Patent Number Title Of Patent Date Issued
7545208 Signal amplification through an electromagnetic device Jun. 9, 2009
7212749 Signal receiver having wide band amplification capability May. 1, 2007

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