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Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi)Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi) description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070164820, Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi). Brief Patent Description - Full Patent Description - Patent Application Claims
RELATED APPLICATIONS [0001] This application is related to the following applications, each of which is incorporated herein by reference in its entirety for all purposes: [0002] This application is related to the following applications, each of which is incorporated herein by reference in its entirety for all purposes: [0003] U.S. patent application Ser. No. ______ (Attorney Docket No. 16149US01) filed ______, 2004; [0004] U.S. patent application Ser. No. ______ (Attorney Docket No. 16150US01) filed ______, 2004; [0005] U.S. patent application Ser. No. ______ (Attorney Docket No. 16151 US01) filed ______, 2004; [0006] U.S. patent application Ser. No. ______ (Attorney Docket No. 16152US01) filed ______, 2004; [0007] U.S. patent application Ser. No. ______ (Attorney Docket No. 16153US01) filed ______, 2004; [0008] U.S. patent application Ser. No. ______ (Attorney Docket No. 16154US01) filed ______, 2004; [0009] U.S. patent application Ser. No. ______ (Attorney Docket No. 16155US01) filed ______, 2004; [0010] U.S. patent application Ser. No. ______ (Attorney Docket No. 16156US01) filed ______, 2004; [0011] U.S. patent application Ser. No. ______ (Attorney Docket No. 16158US01) filed ______, 2004; [0012] U.S. patent application Ser. No. ______ (Attorney Docket No. 16162US01) filed ______, 2004; [0013] U.S. patent application Ser. No. ______ (Attorney Docket No. 16228US01) filed ______, 2004; [0014] U.S. patent application Ser. No. ______ (Attorney Docket No. 16229US01) filed ______, 2004; [0015] U.S. patent application Ser. No. ______ (Attorney Docket No. 16230US01) filed ______, 2004; [0016] U.S. patent application Ser. No. ______ (Attorney Docket No. 16234US01) filed ______, 2004; [0017] U.S. patent application Ser. No. ______ (Attorney Docket No. 16236US01) filed ______, 2004; and [0018] U.S. patent application Ser. No. ______ (Attorney Docket No. 16237US01) filed ______, 2004. FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0019] [Not Applicable] MICROFICHE/COPYRIGHT REFERENCE [0020] [Not Applicable] FIELD OF THE INVENTION [0021] Certain embodiments of the invention relate to the processing of radio signals in a transceiver. More specifically, certain embodiments of the invention relate to a method and system for low noise amplifier (LNA) gain adjustment through narrowband received signal strength indicator (NRSSI). BACKGROUND OF THE INVENTION [0022] Modern communication devices, such as radio frequency (RF) communication devices, process electromagnetic wave signals with variable signal strength. The variable signal strength varies depending on distance between a transmitter and a receiver, as well as environmental factors and process, temperature etc. variations (PVT). A power amplifier (PA) is utilized prior to signal transmission by a transmitter, for example, and a variable gain low noise amplifier (LNA) is utilized after a signal is received by a receiver, to amplify the signal and adjust the signal gain accordingly. Conventional gain control circuits in a signal amplifying device, however, do not improve the linearity of the PA and/or LNA that is utilized for signal amplification. [0023] Different gain control techniques are utilized by conventional gain control circuits in signal amplifying devices without accounting for PVT. For example, amplifier gain in a conventional LNA or PA devices is varied by changing the resistance of one or more resonance tanks in the conventional LNA or PA. A resonance tank may comprise one or more LC circuits, for example, adapted to resonate at a determined frequency. By changing the inductance (L) and/or capacitance (C) of the LC tank, the overall tank resistance may be changed and, as a result, the LNA's or PA's gain may be changed as well. This technique, however, does not compensate for gain variations in the core amplifier circuit due to PVT. [0024] Other conventional gain control techniques utilize PMOS transistor switches to implement low gain and high gain amplification within an exemplary LNA or PA. For example, if the PMOS transistor is turned off, high gain control may be applied by the exemplary LNA or PA. Similarly, if the PMOS transistor is turned on, low gain control may be applied by the LNA or PA. PMOS transistors utilized in conventional variable gain LNA and PA devices, however, cause high parasitic capacitance and increase overall device non-linearity since variations, such as PVT, in the core amplifying circuit are not tracked during an operation cycle. As a result, non-linearity decreases amplifier sensitivity and contributes to the creation of intermodulation (IM) products in the desired signal passband. [0025] Amplifier circuits utilizing a conventional variable gain LNA comprise one or more downconversion mixers followed by a bandpass filter. After a signal is amplified by the variable gain LNA, it may be downconverted by the downconversion mixer, preserving the wideband signal characteristics of the amplified signal. The signal may then be bandpass filtered resulting in a narrow band signal. To improve the LNA sensitivity and increase amplifier linearity, conventional circuits utilize received signal strength indicators (RSSI) after an incoming signal is communicated from the LNA. The received signal strength indicators may provide gain control feedback signals to the LNA for gain adjustment. Such received signal strength indicators, however, require circuits that utilize significant on-chip real estate. In addition, in order to obtain good gain control feedback signal, an amplifier circuit requires numerous received signal strength indicators. [0026] Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of ordinary skill in the art through comparison of such systems with the present invention as set forth in the remainder of the present application with reference to the drawings. BRIEF SUMMARY OF THE INVENTION [0027] Certain embodiments of the invention may be found in a method and system for processing a plurality of signals. Aspects of the method may comprise amplifying an input signal. The amplified input signal may be bandpass filtered. Amplification of the input signal may be adjusted based on only narrowband received signal strength indication of the bandpass filtered amplified input signal. The amplified input signal may be downconverted and a blocker signal may be bandpass filtered from the amplified input signal. Signal strength of a desired signal from the amplified input signal may be measured. [0028] The amplification of the input signal may be adjusted utilizing a triple well (TW) NMOS transistor. A control signal may be generated based on the narrowband received signal strength indication of the bandpass filtered amplified input signal. The amplification of the input signal may be adjusted based on at least one of the generated control signals. The generated control signal may correspond to a powering state of a TW NMOS transistor. If the measured signal strength is below a first threshold value, the input signal may be amplified utilizing a determined first gain of a low noise amplifier (LNA). If the measured signal strength is above a first threshold value and below a second threshold value, the input signal may be amplified utilizing a determined second gain of a low noise amplifier (LNA). [0029] Aspects of the system may comprise a low noise amplifier (LNA) that amplifies an input signal. The amplified input signal may be bandpass filtered by a bandpass filter. The LNA may adjust amplification of the input signal based on only a narrowband received signal strength indication of the bandpass filtered amplified input signal. A downconversion mixer may downconvert the amplified input signal and a bandpass filter may filter a blocker signal from the amplified input signal. A received signal strength indicator block may measure signal strength a desired signal from the amplified input signal. [0030] The LNA may adjust the amplification of the input signal utilizing a triple well (TW) NMOS transistor. The received signal strength indicator block may generate a control signal based on the narrowband received signal strength indication of the bandpass filtered amplified input signal. The LNA may adjust the amplification of the input signal based on the generated at least one control signal, where the generated control signal may correspond to a powering state of a triple well (TW) NMOS transistor. If the measured signal strength is below a first threshold value, the LNA may amplify the input signal utilizing a determined first gain. If the measured signal strength is above a first threshold value and below a second threshold value, the LNA may amplify the input signal utilizing a determined second gain. The LNA may comprise a triple well (TW) NMOS transistor that tracks process and temperature variations (PVT). [0031] These and other features and advantages of the present invention may be appreciated from a review of the following detailed description of the present invention, along with the accompanying figures in which like reference numerals refer to like parts throughout. BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS [0032] FIG. 1 is a circuit illustrating an amplifier circuit that may be utilized in connection with an embodiment of the invention. [0033] FIG. 2 is a circuit diagram illustrating exemplary low noise amplifier (LNA) and power amplifier (PA) circuits that may be utilized in connection with an embodiment of the invention. Continue reading about Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi)... Full patent description for Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi) Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi) patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi) or other areas of interest. ### Previous Patent Application: High efficiency amplifier Next Patent Application: Load-invariant amplifier Industry Class: Amplifiers ### FreshPatents.com Support Thank you for viewing the Method and system for low noise amplifier (lna) gain adjustment through narrowband received signal strength indicator (nrssi) patent info. IP-related news and info Results in 0.30407 seconds Other interesting Feshpatents.com categories: Qualcomm , Schering-Plough , Schlumberger , Seagate , Siemens , Texas Instruments , 174 |
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