公开(公告)号：US11411538B2

公开(公告)日：2022-08-09

申请号：US16417295

申请日：2019-05-20

Applicant: Cisco Technology, Inc.

Inventor： Craig S. Appel ,  Peter C. Metz ,  Joseph V. Pampanin ,  Sanjay Sunder

IPC: H03F1/02 ,  H03F3/45 ,  H03K5/24

Abstract: Embodiments provide for a tunable driving circuit by monitoring a frequency of a ring oscillator of an electrical integrated circuit connected to an optical modulator to determine operational characteristics of the electrical integrated circuit; setting, based on the operational characteristics, a driving voltage for a plurality of tunable inverters and a plurality of fixed gain inverters that control the optical modulator, wherein each tunable inverter of the plurality of tunable inverters is connected in parallel with a corresponding fixed gain inverter of the plurality of fixed gain inverters on one of a first arm and a second arm connected to the optical modulator; and setting an amplification strength for the plurality of tunable inverters based on the operational characteristics.

公开(公告)号：US12095421B2

公开(公告)日：2024-09-17

申请号：US17810792

申请日：2022-07-05

Applicant: Cisco Technology, Inc.

Inventor： Craig S. Appel ,  Peter C. Metz ,  Joseph V. Pampanin ,  Sanjay Sunder

IPC: H03F1/02 ,  H03F3/45 ,  H03K5/24

CPC classification number: H03F1/0211 ,  H03F3/45179 ,  H03F3/45663 ,  H03K5/2481

Abstract: Embodiments provide for a tunable driving circuit by monitoring a frequency of a ring oscillator of an electrical integrated circuit connected to an optical modulator to determine operational characteristics of the electrical integrated circuit; setting, based on the operational characteristics, a driving voltage for a plurality of tunable inverters and a plurality of fixed gain inverters that control the optical modulator, wherein each tunable inverter of the plurality of tunable inverters is connected in parallel with a corresponding fixed gain inverter of the plurality of fixed gain inverters on one of a first arm and a second arm connected to the optical modulator; and setting an amplification strength for the plurality of tunable inverters based on the operational characteristics.

公开(公告)号：US11454856B2

公开(公告)日：2022-09-27

申请号：US16746843

申请日：2020-01-18

Applicant: Cisco Technology, Inc.

Inventor： Craig S. Appel ,  Peter C. Metz

IPC: G02F1/225 ,  G02F1/025 ,  G02F1/01 ,  G02F1/21

Abstract: The present disclosure provide for active boost in an electrical driver via a frequency comparator, configured to determine operational characteristics of an electrical circuit connected to an optical modulator based on a frequency difference between a ring oscillator and the clock signal; an electrical driver configured to drive a phase shift of a first optical signal carried on a first arm relative to a second optical signal carried on a second arm of an optical modulator, the electrical driver comprising: a first signal pathway, connected to the first arm of the optical modulator, wherein the first signal pathway includes: an adjustable gain inverter, electrically connected to first and second nodes; a fixed gain inverter, electrically connected to the first and second nodes; an inductor electrically connected between the second node and a third node; and a non-inverting amplifier connected between the third node and the first node.

公开(公告)号：US11947239B2

公开(公告)日：2024-04-02

申请号：US17820747

申请日：2022-08-18

Applicant: Cisco Technology, Inc.

Inventor： Craig S. Appel ,  Peter C. Metz

IPC: G02F1/225 ,  G02F1/01 ,  G02F1/025 ,  G02F1/21

CPC classification number: G02F1/225 ,  G02F1/0123 ,  G02F1/025 ,  G02F1/212

Abstract: The present disclosure provide for active boost in an electrical driver via a frequency comparator, configured to determine operational characteristics of an electrical circuit connected to an optical modulator based on a frequency difference between a ring oscillator and the clock signal; an electrical driver configured to drive a phase shift of a first optical signal carried on a first arm relative to a second optical signal carried on a second arm of an optical modulator, the electrical driver comprising: a first signal pathway, connected to the first arm of the optical modulator, wherein the first signal pathway includes: an adjustable gain inverter, electrically connected to first and second nodes; a fixed gain inverter, electrically connected to the first and second nodes; an inductor electrically connected between the second node and a third node; and a non-inverting amplifier connected between the third node and the first node.