PATENT CLAIM ANALYSIS

Application Number: 16031692
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["372", "038020"]

Abstract:
The semiconductor laser driving circuit that controls an overshoot on modulation includes a semiconductor laser, of which anode is connected to a power source, that emits the laser light that is modulated by an external modulation input signal, an impedance element connected to a cathode of the laser device, an impedance element connected to the anode, and a collector of a transistor Q 1 , connected to the impedance element; a collector of a transistor Q 2 , connected to the other end of the impedance element, a differential pair circuit to which emitters of Q 1 , Q 2  are connected; an electric current source iMOD connected to the emitters of Q 1 , Q 2 ; and a differential driver that generates a differential voltage (vb 1 −vb 2 ) that controls Q 1 , Q 2  by driving Q 1  by the external modulation input signal, wherein the differential driver controls the differential voltage so that the amplitude of the overshoot of the electric current, which flows in the laser when the output of the laser is at a high-level.

Claim (Index 1):
A semiconductor laser driving circuit comprising:\n a semiconductor laser that emits a laser light, wherein a first electrode thereof is connected to a power source and an external modulation input signal modulates said laser light; a first impedance element, wherein a one end thereof is connected to a second electrode of said semiconductor laser; a second impedance element, wherein a one end thereof is connected to said first electrode of said semiconductor laser and said power source; a differential pair circuit, wherein a first main electrode of a first transistor is connected to the other end of said first impedance element, a first main electrode of a second transistor is connected to the other end of said second impedance element, and a second main electrode of said first transistor and a second main electrode of said second transistor are connected thereto; a power source, wherein a one end thereof is connected to the second main electrode of said first transistor and the second main electrode of said second transistor; and a differential driver that drives said first transistor based on said external modulation input signal and generates a differential voltage that controls said first transistor and said second transistor; wherein said differential driver controls said differential voltage so that an amplitude of an overshoot of an electric current that flows in said semiconductor laser is not larger than a predetermined value when an output of said semiconductor laser is in a high-level due to said external modulation output signal.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 95.0
- Lexical Diversity: 2.91045
- Patent Class: 372.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12402671', '13855419', '10803042', '11167196', '11079381']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7996164197223082
- 35 USC 102 Novelty (BERT): 0.4632695310502965
- Combined Prediction Score: 0.7659817308551071
- Mean Citation Score: 179.51385599999998
- Max Citation Score: 186.5556
- Similarity Product: 162.85448152685166

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