EP 4158774 A1 20230405 - CASCODE AMPLIFIER WITH A FEEDBACK CIRCUIT FOR PROVIDING A BIAS VOLTAGE
Title (en)
CASCODE AMPLIFIER WITH A FEEDBACK CIRCUIT FOR PROVIDING A BIAS VOLTAGE
Title (de)
KASKODENVERSTÄRKER MIT EINER RÜCKKOPPLUNGSSCHALTUNG ZUR BEREITSTELLUNG EINER VORSPANNUNG
Title (fr)
AMPLIFICATEUR CASCODE AVEC UN CIRCUIT DE RÉTROACTION POUR FOURNIR UNE TENSION DE POLARISATION
Publication
Application
Priority
EP 2020067264 W 20200622
Abstract (en)
[origin: WO2021259442A1] The present disclosure relates to a cascode amplifier (1), CA, for amplifying an input voltage (Vin) to an output voltage (Vout), wherein the CA (1) comprises at least one circuit branch (CB1) comprising a load resistor (RL), a first transistor (Ql) and a second transistor (Q2) in series to each other. The CA further comprises a feedback circuit (2) and a reference voltage generation circuit (3). The feedback circuit (2) is configured to provide a bias voltage (Vbias) to the first transistor (Ql) by comparing a cascode voltage (Vcasc) sensed at a terminal of the first transistor (Ql) with a reference voltage (Vref). The reference voltage generation circuit (3) is configured to generate the reference voltage (Vref) using a voltage divider, such that the ratio between a transistor voltage (Vcel) of the first transistor (Ql) and a transistor voltage (Vce2) of the second transistor (Q2) is kept constant.
IPC 8 full level
H03F 1/22 (2006.01); H03F 1/02 (2006.01); H03F 1/30 (2006.01); H03F 3/45 (2006.01)
CPC (source: EP)
H03F 1/0272 (2013.01); H03F 1/22 (2013.01); H03F 1/30 (2013.01); H03F 3/45089 (2013.01); H03F 2200/405 (2013.01); H03F 2200/447 (2013.01); H03F 2200/61 (2013.01); H03F 2203/45356 (2013.01); H03F 2203/45521 (2013.01)
Citation (search report)
See references of WO 2021259442A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2020067264 W 20200622; EP 20734502 A 20200622