| Presentation | 2005-12-16 Variable Gain Amplifier in Polar Loop Modulation Transmitter for EDGE Masahiro ITO, Taizo YAMAWAKI, Masumi KASAHARA, Steve WILLIAMS, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A variable gain amplifier and a polar loop modulation transmitter are presented. This variable gain amplifier is used to add amplitude modulation to a phase-modulated RF signal. For the circuit topology, CMOS inverter topology is adopted because of its good noise and linearity performances. Moreover, the basic inverter topology is modified to enlarge the variable gain range. From a PA point of view, the polar loop modulation transmitter is equivalent to a direct conversion transmitter, because their RF output signals have complete modulation information. The advantage of the polar loop modulation transmitter is that there is no VCO pulling problem. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Variable gain amplifier / Cellular phones / Transmitter / EDGE / Polar loop / Power amplifier |
| Paper # | ICD2005-204 |
| Date of Issue |
| Conference Information | |
| Committee | ICD |
|---|---|
| Conference Date | 2005/12/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Integrated Circuits and Devices (ICD) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Variable Gain Amplifier in Polar Loop Modulation Transmitter for EDGE |
| Sub Title (in English) | |
| Keyword(1) | Variable gain amplifier |
| Keyword(2) | Cellular phones |
| Keyword(3) | Transmitter |
| Keyword(4) | EDGE |
| Keyword(5) | Polar loop |
| Keyword(6) | Power amplifier |
| 1st Author's Name | Masahiro ITO |
| 1st Author's Affiliation | Central Research Laboratory, Hitachi, Ltd.() |
| 2nd Author's Name | Taizo YAMAWAKI |
| 2nd Author's Affiliation | Central Research Laboratory, Hitachi, Ltd. |
| 3rd Author's Name | Masumi KASAHARA |
| 3rd Author's Affiliation | Renesas Technology Corp. |
| 4th Author's Name | Steve WILLIAMS |
| 4th Author's Affiliation | TTPCom Limited |
| Date | 2005-12-16 |
| Paper # | ICD2005-204 |
| Volume (vol) | vol.105 |
| Number (no) | 476 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |