PATENT CLAIM ANALYSIS

Application Number: 16044378
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2020-01
Patent Classification: ["330", "253000"]

Abstract:
A biasing circuit with high current drive capability for fast settling of a biasing voltage to a stacked cascode amplifier is presented. According to a first aspect, the biasing circuit uses transistors matched with transistors of the cascode amplifier to generate a boost current during a transition phase that changes the biasing voltage by charging or discharging a capacitor. The boost current is activated during the transition phase and deactivated when a steady-state condition is reached. According to a second aspect, the biasing circuit uses an operational amplifier in a feedback loop that forces a source node of a cascode transistor of a reference circuit, that is a scaled down replica version of the cascode amplifier, to be at a reference voltage. The high gain and high current capability of the operational amplifier, provided by isolating a high frequency signal processed by the cascode amplifier from the reference circuit, allow for a quick settling of the biasing voltage.

Claim (Index 20):
A method for biasing a stacked cascode amplifier, the method comprising:\n providing a reference circuit that is a scaled down version of the stacked cascode amplifier; coupling gate nodes of the stacked cascode amplifier to respective gate nodes of the reference circuit via respective resistors; based on the coupling, isolating an RF signal processed by the stacked cascode amplifier from the reference circuit; and controlling, via a feedback loop with higher gain, a biasing voltage to a gate node of a cascode transistor of the stacked cascode amplifier based on a voltage sensed at a source node of a respective transistor of the reference circuit, wherein the higher gain is provided by the isolating, wherein the feedback loop controls the biasing voltage so that the voltage sensed at said source node is equal to a reference voltage, wherein the feedback loop comprises an operational amplifier comprising a positive input coupled to the reference voltage, a negative input coupled to the source node of the respective transistor of the reference circuit, and an output coupled to the at least one gate node, and wherein the reference voltage is generated via a resistive voltage divider comprising two series connected resistors with configurable resistances.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 95.0
- Lexical Diversity: 2.25333
- Patent Class: 330.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15279274', '15268297', '15785096', '15451178', '15690115']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7963486833391875
- 35 USC 102 Novelty (BERT): 0.5107944110591688
- Combined Prediction Score: 0.7677932561111857
- Mean Citation Score: 299.0101640000001
- Max Citation Score: 304.55344
- Similarity Product: 249.1828993064117

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test