PATENT CLAIM ANALYSIS

Application Number: 15941603
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["324", "650000"]

Abstract:
There is a low-power multifrequency impedance analyzer based on a monolithic mixed-signal (analog/digital) microchip that performs all the tasks necessary to perform impedance measurements in the frequency range from 10 kHz to 10 MHz. In contrast to a full analog lock-in approach, this mixed-signal solution combines the lock-in approach with the dual step super-heterodyne demodulation scheme. The circuit ensures a CMRR of 81 dB@10 kHz, which increases to 84 dB@10 MHz. The measured equivalent input noise power spectral density is en=2.57 nV/√Hz at 10 kHz in the worst case, close to the 1/f corner frequency. It decreases to en=1.8 nV/√Hz at 1 MHz and en=1.9 nV/√Hz at 10 MHz. Measurements of a reference RC network performed with the proposed low-cost low-power multifrequency impedance analyzer are compared with a Keysight E4980A Precision LCR Meter showing a maximal relative error of 0.8% over the whole operating frequency range.

Claim (Index 5):
The impedance measuring chip as in  claim 4 , further comprising a switch matrix ( 20 ) configured to receive signals from said plurality of analog inputs, and at least one of a current sensor ( 22 ), a low noise amplifier ( 24 ), and a current control loop ( 23 ) coupled to an output of said switch matrix.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 1.57282
- Patent Class: 324.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14214437', '10325370', '12882126', '11171817', '14199319']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.540503855839086
- 35 USC 102 Novelty (BERT): 0.4521641266656181
- Combined Prediction Score: 0.5316698829217392
- Mean Citation Score: 129.37637
- Max Citation Score: 132.16644
- Similarity Product: 100.3422313339448

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

Dataset: test