GB2362523A - A transceiver with the bias of an amplifier in the receiver controlled by a baseband processor - Google Patents
A transceiver with the bias of an amplifier in the receiver controlled by a baseband processor Download PDFInfo
- Publication number
- GB2362523A GB2362523A GB0011950A GB0011950A GB2362523A GB 2362523 A GB2362523 A GB 2362523A GB 0011950 A GB0011950 A GB 0011950A GB 0011950 A GB0011950 A GB 0011950A GB 2362523 A GB2362523 A GB 2362523A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- gain control
- signals
- base
- bias current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000007423 decrease Effects 0.000 claims description 18
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 240000001973 Ficus microcarpa Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
- H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Amplifiers (AREA)
Abstract
The bias current of a low noise amplifier (LNA) 22 in the receiver circuit 18 of a transceiver is controlled to a high value by a baseband processor 14 to maintain linearity in the presence of leakage of a signal from the transmitter. As the signal from the transmitter is lowered the bias current is controlled low to maintain efficiency. Figure 3 shows the use of a control voltage converter 62 to derive the bias current control from the transmitter gain control signal. Figure 4 shows the use of a control voltage converter 72 to derive the bias current control from the receiver gain control signal (which has an inverse relation to the transmitter gain control signal). Use in CDMA and TDMA mobile phones is envisaged.
Description
2362523 Wireless transceivers The present invention relates to wireless
transceivers and more particularly, to a wireless transceiver which can dynamically adjust the bias current of an LNA(low noise amplifier).
Please refer to Fig.l. Fig.1 is a functional block diagram of a previously-considered wireless transceiver 10.
The wireless transceiver 10 comprises an antenna 12 for transmitting or receiving RF (radio frequency) signals, a base-band signal processor 14 for processing base-band signals, an RF transmitter circuit 16 electrically connected between the base-band signal processor 14 and the antenna 12 for converting the base-band signals outputted from the baseband signal processor 14 into RF signals and outputting the RF signals via the antenna 12, an RF 1 receiver circuit 18 electrically connected between the base-band signal processor 14 and the antenna 12 for converting the RF signals received by the antenna 12 into base-band signals and inputting them into the base-band signal processor 14, and a duplexer 20 electrically connected among the antenna 12, the RF transmitter circuit 16 and the RF receiver circuit 18 L for transmitting the RF signals received from the RF transmitter circuit 16 via the antenna 12 and delivering the RF signals from the antenna 12 to the RF receiver circuit 18.
The RF receiver circuit 18 comprises an LNA (low noise amplifier) 22 for amplifying the RF signals received from the antenna 12, a first mixer 24 for mixing the RF signals amplified by the LNA 22 to generate first IF (intermediate frequency) signals, a first gain control amplifier 26 for amplifying the first IF signals according to a first gain control signal outputted from the base-band signal processor 14, and a demodulator 2 8 for demodulating the amplif ied first IF signals outputted from the first gain control amplifier 26 into base-band signals and transmitting the base-band signals to the base-band signal processor 14.
The RF transmitter circuit 16 comprises a modulator 30 for modulating the base-band signals transmitted from the base-band signal processor 14 into second IF 2 signals, a second gain control amplifier 32 for amplifying the second IF signals according to a second 1 signal outputted from the base-band signal processor 14, a second mixer 34 for mixing the amplified second IF signals outputted from the second gain control amplifier 32 to generate RF signals, and a power amplifier 36 for amplifying the RF signals outputted from the second mixer 34 and transmitting them via the antenna 12.
cain contro The base-band signal processor 14 comprises an amplifier control unit 40 electrically connected with a control end 42 of the power amplifier 36 for turning on or off the power amplifier 36, a gain control unit 44 for generating the first and second gain control signals to determine the magnitudes of the gains of the first and second gain control amplifiers 26, 32, and a received signal strength indicator (RSSI) 46 for detecting the strength of the RF signals received at the RF receiver circuit 18 and generating a signal strength parameter, wherein the gain control unit 44 generates the first and second gain control signals according to the signal strength parameter generated by the RSSI 46. To be noticed is that according to some specifications and standards of mobile communication, the mobile phone can follow the direction of the base station to increase or decrease the magnitude of amplification of the second gain control amplifier 32 so as to increase or reduce the transmitting power.
For mobile phone systems using the code division multiple access (CDMA) technology or the frequency 3 division multiple access (FDMA) technology, transmitting and receiving signals are processed at the same time. They are separated by filters of the duplexer 20 according to dif ferent characteristics of the transmitting and receiving frequencies. However, due to the limitation of the real characteristics of the filters, the duplexer 20, in fact, cannot separate the transmitting signals and the receiving signals completely. For example when the RF receiver circuit 18 receives RF signals, part of the RF signals transmitted in the RF transmitter circuit 16 would at the same time leak to the RF receiver circuit 18 via the duplexer 20. Compared with the weak received RF signals, the leaking transmitting RF signals are very strong and become one of the main noise sources in the RF receiver circuit 18.
Besides, the bias current of the LNA 22 is usually predetermined at a fixed current value. If the predetermined bias current is low, once the above mentioned strong noise passes into the LNA 22 accompanying with the RF signals, it may make the LNA 22 move into the non-linear region and then can no longer execute the normal linear amplification of the RF signals. When the LNA operates in the non-linear region, it becomes easier for the interfering signal to modulate the received signal, causing distortion in the desired received signal. Therefore, the bias current of the LNA 22 in the prior art is usually set high to avoid such problems. But if the bias current of the LNA 22 is high, the DC power consumption will increase. To those mobile phones using batteries with 4 limited electrical power, it means the consumption of the electrical power of the battery is faster and the battery must frequently be recharged. This not only wastes power but causes great inconvenience as well.
It is therefore desirable to provide a wireless transceiver which can dynamically adjust the bias current of an LNA so that the LNA can maintain linear amplification of the RF signals and reduce the electrical power consumption to solve the above mentioned problem.
According to one aspect of the present invention, a wireless transceiver comprises an antenna for transmitting or receiving RF signals, a base-band signal processor for processing base-band signals, an RF transmitter circuit electrically connected between the base-band signal processor and the antenna for converting the base-band signals outputted from the base-band signal processor into RF signals and outputting the RF signals via the antenna, and an RF receiver circuit electrically connected between the base-band signal processor and the antenna for converting the RF signals received by the antenna into base-band signals and inputting them into the base-band signal processor. The RF receiver circuit comprises an LNA for amplifying the RF signals received by the antenna. The LNA comprises a control end for controlling its bias current. The base-band signal processor adjusts the bias current of the LNA via the control end of the LNA according to the power of the RF transmitter circuit or that of the RF receiver circuit SO that the ILNA can maintain linear amplification of the RF signals received by the antenna and can save energy.
An advantage of one embodiment is that the base-band signal processor of the wireless transceiver can dynamically adjust the bias current of an LNA according to different receiving or transmitting situations so that the LNA can maintain linear amplification of the RF signals received by the antenna and at the same time reduce the electrical For a better understanding of the present invention, and to show how the same may be carried into effect, reference will now be made, by way of example only, to the accompanying drawings, in which:
Fig. 1 is a functional block diagram of a previously considered wireless transceiver; Fig.2 is a functional block diagram of a first 6 transceiver embodying Lhe present wLreless invention.
Fig.3 is a functional block diagram of a second wireless transceiver embodying the present invention.
Fig. 4 wireless invention.
is a functional block diagram of a third transceiver embodying the present Fig. 2 is a functional block diagram of a first wireless transceiver 50 embodying one aspect of the present invention. In Fig. 2 the components which are identical to those in Fig-1 are indicated by the same reference numerals. The wireless transceiver 50 comprises an antenna 12 for receiving or transmitting RF signals, a base-band signal processor 14 for processing base-band signals, a RF transmitter circuit 16 electrically connected between the base-band signal processor 14 and the antenna 12 for converting the base-band signals outputted from the base-band signal processor 14 into RF signals and transmitting the RF signals via the antenna 12, an RF receiver circuit 18 7 electrically connected between the base-band signal processor 14 and the antenna 12 for converting the RF signals received by the antenna 12 into base-band signals and inputting them into the base-band signall processor 14, and a duplexer 20 electrically connected among the antenna 12, the RF transmitter circuit 16 and the RF receiver c ircuit 18 for transmitting the RF signals from the RF transmitter circuit 16 via the antenna 12 and delivering the RF signals received from the antenna 12 to the RF receiver circuit 18.
The RF receiver circuit 18 comprises an LNA 22 for amplifying the RF signals received from the antenna 12, a first mixer 24 formixing the RF signals amplified by the LNA 22 to generate first IF signals, a f-"rst gain control amplifier 26 for amplifying the first IF signals according to a first gain control signal outputted from the base-band signal processor 14, and a demodulator 28 for demodulating the amplified first IF signals outputted from the first gain control amplifier 26 into base- band signals and transmitting the base-band signals to the base-band signal processor 14.
The RF transmitter circuit 16 comprises a modulator for modulating the base-band signals transmitted from the base-band signal processor 14 into second IF signals, a second gain control amplifier 32 for amplifying the second IF signals according to a second 8 gain control signal outputted from the base-band signal processor 14, a second mixer 34 for mixing the amplified second IF signals outputted from the second gain control amplifier 32 to generate RF signals, and a power amplifier 36 for amplifying the RF signals outputted from the second mixer 34 and transmitting them via the antenna 12.
The base-band signal processor 14 comprises an amplifier control unit 40 electrically connected with a control end 42 of the power amplifier 36 for turning on or off the power amplifier 36, a gain control unit 44 for generating the first and second gain control signals to determine the gains of the first and second gain control amplifiers 26, 32, and a received signal strength indicator (RSSI) 46 for detecting the strength of the RF signals received at the RF receiver circuit 18 and generating a signal strength parameter, wherein the gain control unit 44 generates the first and second gain control signals according to the signal strength parameter generated by the RSSI 46.
The LNA 22 comprises a control end 48 for controlling its bias current and the amplifier control unit 40 further electrically connects with this control end 48. The wireless transceiver 50 is characterized in that the base-band signal processor 14 controls the DC bias current of the LNA 22 via the control end 48 to adjust the bias current of the LNA 22, so that the LNA 22 can maintain linear amplification of the RF signals received from the antenna 12 and at the same time reduce the electrical power consumption. When the 9 RF transmitter circuit 16 transmits RF signals, the amplifier control unit 40 will turn on the power amplifier 36 and increase the DC bias current of the LNA 22. When the RF transmitter circuit 16 does not transmit RF signals, the amplifier control unit 40 will turn off the power amplifier 36 and decrease the DC bias current of the LNA 22 to reduce the electrical power consumed by the LNA 22.
Fig. 3 is a functional block diagram of a second wireless transceiver 60 embodying one aspect of the present invention. The difference between the wireless transceiver 60 of Fig. 3 and the previously-considered wireless transceiver 10 is that the wireless transceiver 60 further comprises a control voltage converter 62 electrically connected between the gain control unit 44 and the control end 48 of the LNA 22 for controlling the LNA 22. When the RF transmitter circuit 16 increases the transmitting power, the gain control unit 44 will use the second gain control signal to increase the gain of the second gain control amplifier 32 of the RF transmitter circuit 16, so that the gain of the second IF signals increases. At the same time, the second gain control signal will be inputted into the control voltage converter 62 to generate a bias current control signal to increase the DC bias current of the LNA 22 When the RF transmitter circuit 16 decreases the transmitting power, the gain control unit 44 will utilize the second gain control signal to decrease the gain of the second gain control amplifier 32, so that the gain of the second IF signals decreases. At the same time, the second gain control signal will be input into the control voltage converter 62 to generate the bias current control signal, which will decrease the DC bias current of the LNA 22 to reduce the power consumption of the LNA 22. That means the magnitude of the bias current control signal is in proportion to the second gain control signal.
Fig. 4 is a functional block diagram of a third wireless transceiver 70 embodying one aspect of the present invention. The difference between the wireless transceiver 70 of Fig. 4 and the wireless transceiver 60 of Fig. 3 is that the magnitude of the bias current control signal generated by the control voltage converter '72 is in proportion to the first gain control signal generated by the gain control unit 44. This embodiment is especially suitable for the wireless transceiver using CDMA technology, such as IS-95/J-008 in American standard. In the system of American standard IS95/J-008, the transmitting power and the receiving power of the wireless transceiver are inversely proportional. If the transmitting power is high, the receiving power will be low. If the transmitting power is low, the receiving power will be high. Therefore, when the receiving power is lower, it means the transmitting power is higher. So the first gain control signal generated by the gain control unit 44 will, at the same time, increase the gain of the first IF signals and cause the control voltage converter '72 to generate a bias current control signal to increase the DC bias current of the LNA 22, so as to maintain the LNA 22 11 in the linear region. Similarly, when the receiving power is higher, it means the transmitting power is lower. So the f irst gain control signals generated by the gain control unit 44 will decrease the gain of the 11 cause 5 first IE signals, and at the same time it wi the control voltage converter 72 to generate a bias current control signal to decrease the DC b Las current of the LNA 22, so as to reduce the electrical power consumed by the LNA 22 and still maintain the LNA in 10 the linear region.
Compared with the wireless transceiver 10 of the prior art, the base-band signal processor 14 of the wireless transceivers 50, 60 and 70 can dynamically adjust the bias current of the LNA 22 via its control end 48 according to different receiving or transmitting situations. In this way, the LNA 22 can not only maintain linear amplification of the RF signals received by the antenna 12, but can also reduce the electrical power consumption.
Those skilled in the art will readily observe that numerous modifications and alterations of the device may be made while retaining the teachings of the invention.
12
Claims (1)
1. A wireless transceiver comprising: an antenna for transmitting or receiving radio a frequency signals; base-band signal processor base-band signals; for processing a radio frequency transmitter circuit electrically connected between the base-band signal processor and the antenna for converting the base-band signals outputted from the base-band signal processor into RF signals and outputting the RF signals via the antenna; and a radio frequency receiver circuit electrically connected between the base-band signal processor and the antenna for converting the RF signals received by the antenna into base-band signals and inputting them into the base-band signal processor, wherein the RF receiver circuit comprises a first amplifier for amplifying the RF signals received by the antenna, the first amplifier comprising a control end for controlling its bias current; wherein the base-band signal processor adjusts the bias current of the first amplifier via the control end of the first amplifier so that the first amplifier can maintain linear amplification of the RF signals received by the antenna.
2. The wireless transceiver of claim 1 wherein the 13 base-band signal processor controls the DC bias current of the first amplifier to change the bias current of the first amplifier.
3. The W-L-reless transceiver of claim 2 wherein the RF receiver circuit further comprises:
a first mixer for mixing the RF signals amplified by the f i r s t amplifier to generate f irst intermediate frequency signals; a first gain control amplifier for amplifying the first intermediate frequency signals according to a first gain control signal outputted from the base-band signal processor; and a demodulator for demodulating the amplified first intermediate frequency signals outputted from the first gain control amplifier into baseband signals and transmitting the base-band signals to the base-band signal. processor.
4. The wireless transceiver of claim 3 wherein the RF transmitter circuit comprises:
modulator for modulating the base-band signals transmitted from the baseband signal processor into second intermediate frequency signals; second gain control amplifier for amplifying the second intermediate frequency signals according to a second gain control signal outputted from the base-band signal processor; second mixer for mixing the amplified second intermediate frequency signals outputted from the second gain control amplifier to generate 14 RF signals; and a second amplifier for amplifying the RF signals outputted from the second mixer and outputting them via the antenna.
5.
The wireless transceiver of claim 4 wherein the base-band signal processor comprises an amplifier control unit electrically connected with the control end of the second amplifier for turning on or turning off the second amplifier.
The wireless transceiver of claim 5 wherein when the RF transmitter circuit is used to transmit RF signals, the amplifier control unit turns on the second amplifier and also increases the DC bias current of the first amplifier, and when the RF transmitter is not used to transmit RF signals, the amplifier control unit turns off the second amplifier and also decrease the DC bias current of the first amplifier so as to save energy.
7. The wireless transceiver of claim 4 wherein the base-band signal processor comprises a gain control unit for generating the first and second gain control signals.
8. The wireless transceiver of claim 7 wherein the base-band signal processor further comprises a received signal strength indicator (RSSI) for detecting the strength of the RF signals received at the RF receiver circuit to generate a signal strength parameter wherein the gain control unit is generates the first and second gain control signals according to the signal strength parameter.
The wireless transceiver of claim 8 wherein the control end of the first amplifier is electrically connected with the gain control unit wherein when the base-band signal processor intends to increase the transmitting power of the RF transmitter circuit. the gain control unit will use the second gain control signal to increase the gain of the second gain control amplifier of the RF transmitter circuit and also increase the DC bias current of the first amplifier, and when the base-band signal processor intends to decrease the transmitting power of the RF transmitter circuit, the gain control unit will use the second gain control signal to decrease the gain of the second gain control amplifier and also decrease the DC bias current of the first amplifier so as to reduce the electrical power consumption.
The wireless transceiver of claim 9 wherein the gain control unit controls the first amplifier via a control voltage converter wherein when the gain control unit uses the second gain control signal to increase the gain of the second gain control amplifier, it also makes the control voltage converter to generate a bias current control signal to increase the DC bias current of the first amplifier, and when the gain control unit uses the second gain control signal to decrease the gain of the second gain control amplifier, the bias current 16 control signal generated by the control voltage converter will also decrease the DC bias current of the first amplifier in order to reduce the electrical power consumed by the first amplifier.
11.The wireless transceiver of claim 10 wherein magnitude of the bias current control signal i proportion to the second gain control signal the s in 12.The wireless transceiver of claim 8 wherein when the power of the RF signals received by the RF receiver circuit decreases, the gain control unit will use the first gain control signal to increase the gain of the first gain control amplifier of the RF receiver circuit and also increase the DC bias current of the first amplifier, and when the power of the RF signals received by the RF receiver circuit increases, the gain control unit will use the first gain control signal to reduce the gain of the first gain control amplifier and also decrease the DC bias current of the first amplifier.
13.The wireless transceiver of claim 12 wherein the gain control unit controls the first amplifier via a control voltage converter wherein when the gain control unit uses the first gain control signal to increase the gain of the first gain control amplifier, it also makes the control voltage converter to generate a bias current control signal to increase the DC bias current of the first amplifier, and when the gain control unit uses the first gain control signal to decrease the gain of 17 the first gain control amplifier, the bias current control signal generated by the control voltage converter will also decrease the DC bias current of the first amplifier soas to reduce the electrical power consumed by the first amplifier.
14.The wireless transceiver of claim 1-3 wherein the magnitude of the bias current control signal is in proportion to the first gain control signal.
18
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW088108816A TW428371B (en) | 1999-05-28 | 1999-05-28 | Radio transceiver system capable of dynamically adjusting the operating bias point of a low noise amplifier |
| GB0011950A GB2362523A (en) | 1999-05-28 | 2000-05-17 | A transceiver with the bias of an amplifier in the receiver controlled by a baseband processor |
| DE10026152A DE10026152C2 (en) | 1999-05-28 | 2000-05-26 | Wireless transceiver |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW088108816A TW428371B (en) | 1999-05-28 | 1999-05-28 | Radio transceiver system capable of dynamically adjusting the operating bias point of a low noise amplifier |
| GB0011950A GB2362523A (en) | 1999-05-28 | 2000-05-17 | A transceiver with the bias of an amplifier in the receiver controlled by a baseband processor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0011950D0 GB0011950D0 (en) | 2000-07-05 |
| GB2362523A true GB2362523A (en) | 2001-11-21 |
Family
ID=26244295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0011950A Withdrawn GB2362523A (en) | 1999-05-28 | 2000-05-17 | A transceiver with the bias of an amplifier in the receiver controlled by a baseband processor |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE10026152C2 (en) |
| GB (1) | GB2362523A (en) |
| TW (1) | TW428371B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005099109A1 (en) * | 2004-04-05 | 2005-10-20 | Qualcomm Incorporated | Power saving mode for receiver circuit blocks based on transmitter activity |
| WO2006069476A1 (en) * | 2004-12-28 | 2006-07-06 | Zte Corporation | A harmonic suppression method for bs transceiver and rf front-end device |
| US8189648B2 (en) | 2002-07-18 | 2012-05-29 | Interdigital Technology Corporation | Scaling using gain factors for use in data detection |
| US9331728B2 (en) | 2003-03-01 | 2016-05-03 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10221424B4 (en) * | 2002-05-14 | 2005-12-15 | Infineon Technologies Ag | Transmitting and receiving arrangement with channel-oriented connection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0814568A1 (en) * | 1996-06-21 | 1997-12-29 | Lucent Technologies Inc. | Wireless telephone intermodulation performance enhancement techniques |
| EP0814567A2 (en) * | 1996-06-21 | 1997-12-29 | Lucent Technologies Inc. | Intermodulation performance enhancement by dynamically controlling RF amplifier current |
| WO1999030426A1 (en) * | 1997-12-09 | 1999-06-17 | Qualcomm Incorporated | Programmable linear receiver |
| WO2000018023A1 (en) * | 1998-09-24 | 2000-03-30 | Conexant Systems, Inc. | Intelligent control of receiver linearity based on interferences |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE514943C2 (en) * | 1994-01-12 | 2001-05-21 | Ericsson Ge Mobile Communicat | Conserving power in battery-powered transceiver |
| CN1084114C (en) * | 1995-01-31 | 2002-05-01 | 日本电气株式会社 | Mobile radio unit with automatic gain control circuit and method for automatic gain control in said mobile radio unit |
-
1999
- 1999-05-28 TW TW088108816A patent/TW428371B/en not_active IP Right Cessation
-
2000
- 2000-05-17 GB GB0011950A patent/GB2362523A/en not_active Withdrawn
- 2000-05-26 DE DE10026152A patent/DE10026152C2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0814568A1 (en) * | 1996-06-21 | 1997-12-29 | Lucent Technologies Inc. | Wireless telephone intermodulation performance enhancement techniques |
| EP0814567A2 (en) * | 1996-06-21 | 1997-12-29 | Lucent Technologies Inc. | Intermodulation performance enhancement by dynamically controlling RF amplifier current |
| WO1999030426A1 (en) * | 1997-12-09 | 1999-06-17 | Qualcomm Incorporated | Programmable linear receiver |
| WO2000018023A1 (en) * | 1998-09-24 | 2000-03-30 | Conexant Systems, Inc. | Intelligent control of receiver linearity based on interferences |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8189648B2 (en) | 2002-07-18 | 2012-05-29 | Interdigital Technology Corporation | Scaling using gain factors for use in data detection |
| US11129097B2 (en) | 2003-03-01 | 2021-09-21 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US9331728B2 (en) | 2003-03-01 | 2016-05-03 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US9838962B2 (en) | 2003-03-01 | 2017-12-05 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US10129825B2 (en) | 2003-03-01 | 2018-11-13 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US10524202B2 (en) | 2003-03-01 | 2019-12-31 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US11564164B2 (en) | 2003-03-01 | 2023-01-24 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US11638210B1 (en) | 2003-03-01 | 2023-04-25 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US11991626B2 (en) | 2003-03-01 | 2024-05-21 | Theta Ip, Llc | Power dissipation reduction in wireless transceivers |
| US7283851B2 (en) | 2004-04-05 | 2007-10-16 | Qualcomm Incorporated | Power saving mode for receiver circuit blocks based on transmitter activity |
| KR100869676B1 (en) | 2004-04-05 | 2008-11-21 | 퀄컴 인코포레이티드 | Wireless apparatus and integrated circuit with power saving mode for receiver circuit blocks based on transmitter activity and method of adjusting bias current therein |
| WO2005099109A1 (en) * | 2004-04-05 | 2005-10-20 | Qualcomm Incorporated | Power saving mode for receiver circuit blocks based on transmitter activity |
| WO2006069476A1 (en) * | 2004-12-28 | 2006-07-06 | Zte Corporation | A harmonic suppression method for bs transceiver and rf front-end device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10026152C2 (en) | 2002-12-12 |
| TW428371B (en) | 2001-04-01 |
| DE10026152A1 (en) | 2001-02-15 |
| GB0011950D0 (en) | 2000-07-05 |
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