公开(公告)号：US20250167734A1

公开(公告)日：2025-05-22

申请号：US18512765

申请日：2023-11-17

Applicant: Nokia Solutions and Networks Oy

Inventor： Philipp Thomas

IPC: H03F1/02 ,  H03F3/45

Abstract: A basic (single-ended or differential) switchable transconductance amplifier has voltage-input circuitry and selector circuitry connected between capacitor circuitry and current-sink circuitry, where the capacitor circuitry and the selector circuitry are controlled to selectively convert an input voltage signal applied to the voltage-input circuitry into an output current signal, where the voltage-input circuitry and the selector circuitry are implemented at the same circuit level. More-complex circuits, such as multiplexers and de-multiplexers, can be based on the basic amplifier circuitry. By implementing the voltage-input circuitry and the selector circuitry at the same circuit level, the resulting circuit can have lower voltage overhead than equivalent prior-art circuitry, resulting in shorter switching time, higher operational bandwidth, and lower power consumption.

公开(公告)号：US20240377695A1

公开(公告)日：2024-11-14

申请号：US18195128

申请日：2023-05-09

Applicant: Nokia Solutions and Networks Oy

Inventor： Alessandro Aimone ,  Philipp Thomas

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

Abstract: A planar electro-optic Mach-Zehnder modulator (MZM) includes two optical waveguide arms and three drive electrodes extending along the optical waveguide arms to modulate light propagating therein. A middle one of the drive electrodes is between the two optical waveguide arms, and the two optical waveguide arms are between outer ones of the drive electrodes. An electrical drive circuit is connected to provide first modulation signals to the two outer ones of the drive electrodes and a second modulation signal to the middle one of the drive electrodes, wherein the second modulation signal is voltage-inverted relative to the first modulation signals.