Patents Assigned to 3PEAK INC.
  • Patent number: 11316483
    Abstract: Provided is an input voltage endurance protection architecture applied to a high-voltage operational amplifier with high input amplitude and high linearity. The input voltage endurance protection architecture includes three parts: a main operational amplifier, an auxiliary operational amplifier and an input stage voltage endurance protection circuit. The main operational amplifier is a high-voltage general-purpose operational amplifier, the auxiliary operational amplifier is a single-stage differential amplifier, and the single-stage differential operational amplifier is connected to a degeneration resistor Rbias. In addition, the auxiliary operational amplifier has a same connection method as the main operational amplifier at a positive input terminal and a negative input terminal, and both the positive input terminal and the negative input terminal are protected by an input stage voltage endurance protection circuit and receive and process input signals simultaneously.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: April 26, 2022
    Assignee: 3PEAK INC.
    Inventor: Qingfeng Liu
  • Publication number: 20220045651
    Abstract: Provided is an input voltage endurance protection architecture applied to a high-voltage operational amplifier with high input amplitude and high linearity. The input voltage endurance protection architecture includes three parts: a main operational amplifier, an auxiliary operational amplifier and an input stage voltage endurance protection circuit. The main operational amplifier is a high-voltage general-purpose operational amplifier, the auxiliary operational amplifier is a single-stage differential amplifier, and the single-stage differential operational amplifier is connected to a degeneration resistor Rbias. In addition, the auxiliary operational amplifier has a same connection method as the main operational amplifier at a positive input terminal and a negative input terminal, and both the positive input terminal and the negative input terminal are protected by an input stage voltage endurance protection circuit and receive and process input signals simultaneously.
    Type: Application
    Filed: December 9, 2019
    Publication date: February 10, 2022
    Applicant: 3PEAK INC.
    Inventor: Qingfeng Liu
  • Patent number: 11169558
    Abstract: Provided is a logarithmic current-to-voltage conversion circuit having a temperature compensation function. The circuit includes a logarithmic current-to-voltage conversion buffer unit, a positive temperature coefficient compensation unit and a self-heating unit. The logarithmic current-to-voltage conversion buffer unit is provided with a reference circuit consistent with a basic logarithmic circuit. A temperature coefficient is reflected by a difference value ?Vbe between an output of the basic logarithmic circuit and an output of the reference circuit. The positive temperature coefficient compensation unit is provided with a voltage-to-current conversion circuit at a first stage and a current mirror at a second stage and outputs a voltage Vout through an resistor R2. The positive temperature coefficient compensation unit is connected to ?Vbe.
    Type: Grant
    Filed: December 9, 2019
    Date of Patent: November 9, 2021
    Assignee: 3PEAK INC.
    Inventor: Chuanbo Shi
  • Publication number: 20210232170
    Abstract: Provided is a logarithmic current-to-voltage conversion circuit having a temperature compensation function. The circuit includes a logarithmic current-to-voltage conversion buffer unit, a positive temperature coefficient compensation unit and a self-heating unit. The logarithmic current-to-voltage conversion buffer unit is provided with a reference circuit consistent with a basic logarithmic circuit. A temperature coefficient is reflected by a difference value ?Vbe between an output of the basic logarithmic circuit and an output of the reference circuit. The positive temperature coefficient compensation unit is provided with a voltage-to-current conversion circuit at a first stage and a current mirror at a second stage and outputs a voltage Vout through an resistor R2. The positive temperature coefficient compensation unit is connected to ?Vbe.
    Type: Application
    Filed: December 9, 2019
    Publication date: July 29, 2021
    Applicant: 3PEAK INC.
    Inventor: Chuanbo Shi