Verstärkungsreglungsstufe für einen Verstärker mit Variabler Verstärkung

Details

Veröffentlichungs-Nr.

EP3672075

Aktenzeichen

EP19154834

Anmeldetag

31. Januar 2019

Veröffentlichung

16. August 2023

Erteilung

16. August 2023

Rechtsraum

EP

IPC

H03G1/00H03F3/45H03G1/04H03G3/30

Abstract

The invention relates to a gain-control stage (100) for generating gain-control signals (V_c+, V_c-) for controlling an external variable-gain amplifying unit (101). The gain-control stage comprises a first (102) and a second differential amplifier unit (112) that receive, at a respective input interface (104,114) a reference voltage signal (V_Ref) and a variable gain-control voltage signal (V_GC). The second differential amplifier unit is configured to provide, via a second output interface (120), a control voltage signal (Vi) to a controllable first current source (106) of the first differential amplifier unit (102). The first differential amplifier unit (102) is configured to provide, via a first output interface (110), the first and the second gain-control signal (V_C+, V_C-) in dependence on the variable gain-control voltage signal (V_GC), the reference voltage signal (V_Ref) and a first biasing current (I_B1) that depends on the control voltage signal.

Anmelder

Firma

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

Land

🇩🇪 Deutschland

Fachgebiete