Ausgangs-Gleichtaktspannungsregulierter Variabler Gain-Verstärker

Details

Veröffentlichungs-Nr.

EP3503389

Aktenzeichen

EP17209770

Anmeldetag

21. Dezember 2017

Veröffentlichung

13. März 2024

Erteilung

13. März 2024

Rechtsraum

EP

IPC

H03G1/00H03F3/45H03F1/48H03F3/08H03F3/195

Abstract

A variable gain amplifier for amplifying a differential pair of input voltage signals, comprising a control input for receiving a differential pair of gain control voltage signals, a differential signal input for receiving a differential pair of input voltage signals, a current commuting stage receiving the pair of input voltage signals and the gain control voltage, and comprising a pair of cascode circuits for providing a differential pair of current components of respective current amounts that depend on the respective input voltage signal and on the received gain control voltage, a differential load stage receiving the current components and having respective resistive loads of a respective load resistance amount for generating a differential pair of output voltage signals having respective output voltage amounts that depend on the respective current amounts and on the load resistance amounts and a differential signal output having respective differential signal output nodes for providing the differential pair of output voltage signals, wherein the variable gain amplifier further comprises a common-mode bias servo stage that receives a reference voltage of a reference voltage amount and the differential pair of output voltage signals, and that comprises a pair of closed loop differential amplifiers, each configured to generate a respective DC bias voltage of a DC bias voltage amount depending on a difference between the respective output voltage amount and the reference voltage amount, and each feeding the respective generated DC bias voltage back to the respective differential signal output node.

Anmelder

Firma

IHP GmbH - Innovations for High Performance Microelectronics / Leibniz-Institut für innovative Mikroelektronik

Land

🇩🇪 Deutschland

Fachgebiete