PATENT CLAIM ANALYSIS

Application Number: 15861183
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-07
Patent Classification: ["327", "374000"]

Abstract:
A circuit for an RF switch using FET transistors that largely cancels the non-linearity of the C oss  of the FETs over a majority of the signal range, and reduces distortion. The RF switch includes two substantially identical FETs. The source of one FET is connected to the drain of the other FET and the node formed comprises one terminal of the switch. Two substantially identical capacitors are connected in series with each other and in parallel with the FETs, and the node thus formed comprises the second terminal of the switch. The capacitors are selected such that they have negligible impedance at AC frequencies for which the switch is expected be used, and in particular a much lower impedance than C oss  of each FET. A voltage source with a series impedance is also connected in parallel with the capacitors and the two FETs.

Claim (Index 1):
An RF switch, comprising:\n a first FET and a second FET, each FET having a drain, a source, a gate, and an output capacitance C oss , wherein the source of the first FET is connected to the drain of the second FET, and the connection of the first FET and the second FET comprises a first terminal of the switch; a first capacitor and a second capacitor connected in series, each capacitor having a first terminal and a second terminal, the first terminals of the first capacitor and the second capacitor being connected together, wherein the connection of the first and second capacitors comprises a second terminal of the switch, the second terminal of the first capacitor being connected to the drain of the first FET, and the second terminal of the second capacitor being connected to the source of the second FET, the first and second capacitors having an impedance substantially lower than the C oss  of the first and second FETs; a DC bias voltage source and a series impedance connected from the drain of the first FET to the source of the second FET in parallel with the first and second capacitors; and first and second voltage sources for applying a controlled gate voltage from the gate to the source of the first FET and the second FET, respectively; whereby the RF switch is turned on by applying, via the first and second voltage sources, an appropriate gate to source voltage to the first and second FETs, such that an AC current can flow in parallel through low-impedance first and second branches comprising, respectively, the first FET and the first capacitor, and the second FET and the second capacitor.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 86.0
- Lexical Diversity: 2.10959
- Patent Class: 327.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['12177469', '12473351', '14052680', '15487112', '13936177']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6886957757615287
- 35 USC 102 Novelty (BERT): 0.4683239091080167
- Combined Prediction Score: 0.6666585890961776
- Mean Citation Score: 194.564122
- Max Citation Score: 198.18558
- Similarity Product: 160.71283955321792

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

Dataset: test