US 5,770,972 AGranted

Coupling circuit

AssigneeZero Impedance Systems, Inc.

InventorsGeorge H. Freuler, Edward J. Collier, deceased, David Mazi, R. David Middlebrook

Life of this patent

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Abstract

A coupling circuit composed of an input terminal for receiving an input signal from a source and first and second output terminals for supplying an output signal to a load; a signal processing device connected between the input terminal and the first output terminal for deriving an output signal from the input signal and for supplying the output signal to a load connected between the output terminals; a power supply; connecting lines each having a finite impedance and connected for supplying operating power from the power supply to the signal processing device, a distortion eliminating circuit connected between the power supply and the second output terminal for directing load current to the signal processing device so as to bypass the load current from the line impedances, the distortion eliminating device including at least one active circuit element and having an electric characteristic corresponding substantially to a capacitor with infinite capacitance.

Claims16

Dependent claims

In a signal coupling circuit which includes:

an input terminal for receiving an input signal from a source and first and second output terminals for supplying an output signal to a load;
signal processing means connected between the input terminal and the first output terminal for deriving an output signal in response to the input signal and for supplying the output signal to a load connected between the output terminals to produce a load current in the load, the signal processing means having power supply terminals for receiving operating power;
power supply means having a ground terminal;
and connecting lines each having a finite impedance and connected for supplying operating power from the power supply means to the signal processing means, the improvement comprising distortion eliminating means connected between said power supply terminals and said second output terminal for directing load current to said power supply terminals so as to bypass the load current from said line impedances, said distortion eliminating means comprising at least one active circuit element and having an electric characteristic corresponding substantially to a capacitor with infinite capacitance.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/800,624Filed 14 Feb 1997 · division
Priority: 16 Mar 1992
Granted: 23 Jun 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H03F 3/4521
Using MOSFET transistors as the active amplifying circuit: complementary long tailed pairs having parallel inputs and being supplied in parallel
H03F 3/3076
The emitters of complementary power transistors being connected to the output: with symmetrical driving of the end stage
H03F 3/3081
Single-ended push-pull [SEPP] amplifiers ; Phase-splitters therefor: duplicated single-ended push-pull arrangements, i.e. bridge circuits
H03F 3/45224
Using MOSFET transistors as the active amplifying circuit: complementary Pl types having parallel inputs and being supplied in parallel

Family

Serial851,334Parent of this continuation-in-part · filed 16 Mar 1992
Serial914,568Parent of this continuation-in-part · filed 17 Jul 1992
Serial413,194Parent of this division · filed 27 Mar 1995
US 5,604,463 AParent of this division
US 5,402,084 AParent of this continuation-in-part
US 5,300,893 AParent of this continuation-in-part
US 5,770,972 AThis patent

From the US filing history. Foreign family members aren’t listed.