| 54 |
Title |
TI |
[DE] Funkfrequenzsender
[EN] Radio frequency transmitter
[FR] Transmetteur de fréquence radio |
| 71/73 |
Applicant/owner |
PA |
LUCENT TECHNOLOGIES INC, US
|
| 72 |
Inventor |
IN |
CHALERMWISUTKUL SURAMATE, TH
;
FISCHER GEORG, DE
;
HESSELBARTH JAN, CH
;
PIVIT FLORIAN, IR
|
| 22/96 |
Application date |
AD |
Nov 12, 2007 |
| 21 |
Application number |
AN |
07291354 |
|
Country of application |
AC |
EP |
|
Publication date |
PUB |
Apr 7, 2010 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
H04L 25/03
(2006.01)
|
| 51 |
IPC secondary class |
ICS |
H04L 27/00
(2006.01)
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
H03F 3/2171
H03F 3/245
H04L 25/03828
H04L 27/00
|
|
MCD main class |
MCM |
H04L 25/03
(2006.01)
|
|
MCD secondary class |
MCS |
H04L 27/00
(2006.01)
|
|
MCD additional class |
MCA |
|
| 57 |
Abstract |
AB |
[EN] The invention concerns a radio frequency transmitter (RFT) and a method of amplifying a radio frequency input signal (S IN ) in the radio frequency transmitter (RFT). The radio frequency transmitter (RFT) comprises a digital signal generator (DSG) with a generation unit (GU) adapted to generate a pulsed bit stream signal and a switch mode power amplifier (SMPA) with a transistor circuit (PT) adapted to amplify the radio frequency input signal (S IN ). The digital signal generator (DSG) further comprises a control unit (CU) adapted to detect in said pulsed bit stream signal a sequence of a constant signal height longer than a predefined threshold. The control unit (CU) is also adapted to initiate, upon detection of said sequence, a generation of a modified pulsed bit stream signal by an insertion of one or more notches in said sequence. Said notches interrupt said sequence by a signal of a signal height different from the signal height of the sequence. The radio frequency transmitter (RFT) further comprises connecting means (CM) adapted to provide said transistor circuit (PT) with said modified pulsed bit stream signal as the radio frequency input signal (S IN ). |
| 56 |
Cited documents identified in the search |
CT |
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
No results
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
|
