PATENT CLAIM ANALYSIS

Application Number: 15911164
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-09
Patent Classification: ["330", "261000"]

Abstract:
The present invention reveals a new biasing method which can be used in solid state audio power amplifier design despite of the Class of operation. The proposed biasing technology relies only on traditional electrical feedback to build up and maintain the desired biasing current and doesn't need thermal coupling or thermal tracking techniques in order to overcome power transistor device's temperature dependent input-output characteristics as required by traditional approach. An ingenious current sensing and amplification circuit is devised in order to generate an voltage output which is only corresponding to the quiescent biasing current of the output stage. This voltage output is then used as an representative of the power stage biasing current to be regulated by a feedback loop comprising a traditional voltage multiplier, the output stage and the aforementioned current sensing and amplification circuit.

Claim (Index 10):
A biasing circuit as recited in  claims 1 , wherein said complimentary differential amplifier is comprised of one N type differential pair amplifier and one P type differential pair amplifier; wherein said N type differential pair amplifier is comprised of a pair of N type transistors, a current source and a pair of load resistor; wherein said pair of N type transistors is configured as a common emitter differential amplifier if Bipolar Junction Transistors (hereafter denoted as BJT) are used or as a common source differential amplifier if Field Effect Transistors (hereafter denoted as FET) are used and has the two emitter or the source nodes connected to said current source and form a joint emitter or source node, respectively; wherein each of said load resistor pair is connected between each transistor output node, i.e., the collector node if BJT is used or drain node if FET is used, and a common floating rail, respectively; wherein the two transistor input nodes, i.e., the base nodes if BJTs are used or gate nodes if FETs are used, form the differential input nodes of said N type differential pair amplifier; wherein the output node of the transistor which has its input connected to said voltage output of said current sensing circuit forms one output node of said complimentary differential amplifier; similarly, said P type differential pair amplifier is comprised of a pair of P type transistors, a current source and a pair of load resistor; wherein said pair of P type transistors is configured as a common emitter differential amplifier if BJTs are used or as a common source differential amplifier if FETs are used and has the two emitter or the source nodes connected to said current source and form a joint emitter or source node, respectively; wherein each of said load resistor pair is connected between each transistor output node, i.e., the collector node if BJT is used or drain node if FET is used, and said common floating rail, respectively; wherein the two transistor input nodes, i.e., the base nodes if BJTs are used or gate nodes if FETs are used, form the differential input nodes of said P type differential pair amplifier; wherein the output node of the transistor which has its input connected to said voltage output of said current sensing circuit forms the other output node of said complimentary differential amplifier; wherein said common floating rail is the common connection node of said 4 load resistors and is not connect to a reference voltage or power supply.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 90.0
- Lexical Diversity: 1.70238
- Patent Class: 330.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13863429', '11136203', '12464481', '10316990', '14197695']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7774167444081733
- 35 USC 102 Novelty (BERT): 0.483866754331444
- Combined Prediction Score: 0.7480617454005004
- Mean Citation Score: 203.814792
- Max Citation Score: 208.58533
- Similarity Product: 159.79291740650356

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test