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 1):
A circuit arrangement comprising:\n a stacked cascode amplifier comprising an input transistor and one or more cascode transistors, the one or more cascode transistors comprising an output transistor, wherein the input transistor is configured to receive an RF signal and the output transistor is configured to output an amplified version of the RF signal; a reference circuit that is a scaled down version of the stacked cascode amplifier, the reference circuit coupled to the stacked cascode amplifier via respective gate nodes; and a biasing circuit configured to provide a biasing voltage to at least one gate node of a transistor of the one or more cascode transistors and a gate node of a respective transistor of the reference circuit, wherein the biasing circuit comprises a feedback loop that senses a voltage at a source node of the respective transistor of the reference circuit and controls the biasing voltage so that a sensed voltage 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): 0.796547864051109
- 35 USC 102 Novelty (BERT): 0.5085499659868137
- Combined Prediction Score: 0.7677480742446794
- Mean Citation Score: 299.0101640000001
- Max Citation Score: 304.55344
- Similarity Product: 262.2497745886326

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