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Class Information
Number: 330/157
Name: Amplifiers > Interstage coupling
Description: Subject matter wherein the amplifier is comprised of at least two amplifying devices in cascade, the two being in direct proximity in the cascaded circuit and wherein there are significant details or distinctive characteristics of the circuit by means of which the signal output of the preceding amplifying device is coupled to the signal input of the following cascaded amplifying device, or wherein the parameters or electrical characteristics of the output of the preceding device or the input of the following device, are claimed.

Sub-classes under this class:

Class Number Class Name Patents
330/172 Coupling from cathode 3
330/158 Coupling to cathode 1
330/160 Coupling to plate or auxiliary grid 0
330/181 D.c. coupled 3
330/162 Output coupling from grid 2
330/165 Transformer coupling 65
330/177 With coupling or blocking capacitor 4
330/174 With electromechanical transducer (e.g., piezoelectric crystal) 31
330/164 With electronic tube or diode in coupling circuit 1
330/175 With lattice or wheatstone bridge network in coupling circuits 2
330/176 With t, h, or pi network in coupling circuit 2

Patents under this class:

Patent Number Title Of Patent Date Issued
8264272 Digital control interface in heterogeneous multi-chip module Sep. 11, 2012
8121312 Wide-band equalization system Feb. 21, 2012
6680647 Low noise amplifier circuit with phase matched switch topology Jan. 20, 2004
6259298 Method and an arrangement for adapting from a DC point of view a first circuit to at least one second circuit Jul. 10, 2001
5627486 Current mirror circuits and methods with guaranteed off state and amplifier circuits using same May. 6, 1997
4131859 Method of compensation of intermodulation noise and devices for the implementing thereof Dec. 26, 1978

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