# US 9,436,019 B1 · Driver and capacitive load integration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,436,019 B1 - Document ID: US9436019B1 - Status: Granted - Kind: B1 - Application number: 14/733,678 - Filed: 2015-06-08 - Granted: 2016-09-06 - Earliest claimed: 2015-06-08 - Assignees: Ciena Corporation - Applicants: Vladimir Pelekhaty; Michael Y. Frankel - Inventors: Vladimir Pelekhaty; Michael Y. Frankel - Web page: https://patentgrep.com/patent/US9436019B1 ## CPC - G02F 1/0121: {Operation of devices; Circuit arrangements, not otherwise provided for in this subclass} - H10N 30/20: with electrical input and mechanical output, e.g. functioning as actuators or vibrators - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract A circuit that may include a circuit network and a transmission line coupled to the circuit network. The circuit network may include an electro-optic modulator and various inductors. The electro-optic modulator may be a capacitive load having a predetermined capacitance. The circuit may further include a resistor coupled to the circuit network. The resistor may have a resistance value configured to produce a first impedance with the circuit network. The first impedance may be configured to match substantially with a second impedance in the transmission line. The circuit may further include an electric driver couple to the transmission line. The electric driver may be configured for transmitting a driving voltage to the electro-optic modulator. The driving voltage may be configured to generate a predetermined voltage swing across the electro-optic modulator. ## Claims ### Claim 1 A circuit, comprising: a circuit network comprising an electro-optic modulator and a plurality of inductors, wherein the electro-optic modulator is a capacitive load having a predetermined capacitance; a first transmission line coupled to the circuit network; a resistor coupled to the circuit network, the resistor having a resistance value configured to produce a first impedance with the circuit network, and wherein the first impedance is configured to match substantially with a second impedance of the first transmission line; and an electric driver coupled to the first transmission line, wherein the electric driver is configured for transmitting a driving voltage to the electro-optic modulator, and wherein the driving voltage is configured to generate a predetermined voltage swing across the electro-optic modulator. ### Claim 2 (depends on 1) The circuit of claim 1, wherein the plurality of inductors within the circuit network have no mutual coupling. ### Claim 3 (depends on 1) The circuit of claim 1, wherein the circuit network comprises a bridged-T network. ### Claim 4 (depends on 1) The circuit of claim 1, wherein the electro-optic modulator is configured to convert one or more electrical signals into one or more modulated optical waves. ### Claim 5 (depends on 1) The circuit of claim 1, wherein the predetermined capacitance is based on an electrical-to-optical conversion efficiency of the electro-optic modulator. ### Claim 6 (depends on 1) The circuit of claim 1, wherein the voltage swing corresponds to a difference between a first power output of the electro-optic modulator and a second power output of the electro-optic modulator, wherein the first power output generates an optical transmission using an optical source in the electro-optic modulator, and wherein the second power output generates approximately no optical transmission. ### Claim 7 (depends on 1) The circuit of claim 1, wherein the predetermined capacitance is based on a predetermined optical modulation amplitude of the electro-optic modulator. ### Claim 8 (depends on 1) The circuit of claim 1, further comprising: wherein the electric driver and the electro-optic modulator are separated by a predetermined distance within an assembly, wherein the first transmission line spans at least a portion of the predetermined distance, and wherein a material medium of the first transmission line is configured with a predetermined impedance based on the at least the portion of the predetermined distance. ### Claim 9 (depends on 1) The circuit of claim 1, wherein the first transmission line is configured to produce a predetermined impedance mismatch with the bridged-T network, and wherein the predetermined impedance mismatch is configured to generate a predetermined electrical reflection from the bridged-T network to the electric driver through the first transmission line. ### Claim 10 (depends on 1) The circuit of claim 1, wherein the predetermined capacitance is based on a predetermined transducer efficiency. ### Claim 11 (depends on 1) The circuit of claim 1, wherein the first transmission line is a tapered transmission line. ### Claim 12 (depends on 1) The circuit of claim 1, wherein the first transmission line is a microstrip. ### Claim 13 (depends on 1) The circuit of claim 1, further comprising: a second transmission line coupled to the capacitive load; and a terminating resistor coupled to the second transmission line. ### Claim 14 (depends on 1) The circuit of claim 1, wherein the predetermined capacitance corresponds to a gap between electrodes in the electro-optic modulator. ### Claim 15 A circuit, comprising: a capacitive load comprising an electro-optic modulator, wherein the capacitive load is configured with a first predetermined capacitance; an electric driver, wherein the electric driver is configured for transmitting a driving voltage to the capacitive load, and wherein the driving voltage is configured to generate a predetermined voltage swing across the electro-optic modulator; a first inductor-and-capacitor (LC) ladder network compensation circuitry; and a second LC ladder network compensation circuitry, wherein the first and second LC ladder network compensation circuitries are configured for matching the electric driver with the capacitive load. ### Claim 16 (depends on 15) The circuit of claim 15, wherein the predetermined capacitance is based on a predetermined optical modulation amplitude of the electro-optic modulator. ### Claim 17 (depends on 15) The circuit of claim 15, wherein the first LC ladder network circuitry comprises a second predetermined capacitance configured using an open-circuited stub. ### Claim 18 (depends on 15) The circuit of claim 15, wherein the first LC ladder network circuitry comprises a predetermined inductance configured using a short-circuited stub. ### Claim 19 (depends on 15) The circuit of claim 15, wherein the predetermined capacitance is based on an electrical-to-optical conversion efficiency of the electro-optic modulator. ### Claim 20 (depends on 15) The circuit of claim 15, wherein the predetermined capacitance is configured based on a predetermined voltage eye opening across the electro-optic modulator.