EP 1815593 A1 20070808 - POWER AMPLIFIER FOR AMPLIFYING HIGH-FREQUENCY (H.F.) SIGNALS
Title (en)
POWER AMPLIFIER FOR AMPLIFYING HIGH-FREQUENCY (H.F.) SIGNALS
Title (de)
LEISTUNGSVERST[RKER ZUM VERST[RKEN VON HOCHREQUENZ (HF)-SIGNALEN
Title (fr)
AMPLIFICATEUR DE PUISSANCE POUR L'AMPLIFICATION DE SIGNAUX A HAUTE FREQUENCE (HF)
Publication
Application
Priority
- EP 2005012021 W 20051110
- DE 102004056435 A 20041123
Abstract (en)
[origin: WO2006056321A1] An H.F. power amplifier is disclosed having a plurality of branches (10, 11, 12) switched in parallel. Each branch comprises a plurality of amplifier elements (T1, , T4) switched in series. Resistors (R2, , R5) enable the voltage (U_DS) applied to the amplifier elements (T1, , T4) to be set at a fraction of a supply voltage (Ud) applied to the branches (10, 11, 12). Capacitors (C2, , C4) are used to adjust the source impedance of the amplifier elements (T2, , T4). In order to prevent the gate-drain voltage (U_GD) from exceeding the breakdown voltage of an amplifier element (T1, , T4) and damaging the amplifier element (T1, , T4), a limiting path (7) is connected according to the invention between the gate terminal (G) and the drain terminal (D) of the amplifier element (T1, , T4), the limiting path (7) being switchable between a conducting state and a blocking state depending on the gate-drain voltage (U_GD).
IPC 8 full level
H03F 3/195 (2006.01); H03F 1/02 (2006.01); H03F 1/52 (2006.01); H03F 3/21 (2006.01); H03F 3/42 (2006.01); H03F 3/60 (2006.01); H03F 3/72 (2006.01)
CPC (source: EP US)
H03F 1/0277 (2013.01 - EP US); H03F 1/223 (2013.01 - EP US); H03F 1/52 (2013.01 - EP US); H03F 1/523 (2013.01 - EP US); H03F 3/195 (2013.01 - EP US); H03F 3/211 (2013.01 - EP US); H03F 3/423 (2013.01 - EP US); H03F 3/604 (2013.01 - EP US); H03F 3/72 (2013.01 - EP US); H03F 2200/451 (2013.01 - EP US); H03F 2203/7215 (2013.01 - EP US)
Citation (search report)
See references of WO 2006056321A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102004056435 A1 20060601; EP 1815593 A1 20070808; US 2008265997 A1 20081030; US 7551036 B2 20090623; WO 2006056321 A1 20060601
DOCDB simple family (application)
DE 102004056435 A 20041123; EP 05808222 A 20051110; EP 2005012021 W 20051110; US 71989305 A 20051110