Patent number 8526995 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "Radio frequency (RF) transmitters of the type used in mobile wireless telephones (also known as cellular telephones) and other portable radio transceivers commonly include transmit power control circuitry that adjusts the power of the transmitted RF signal. The power control circuitry can adjust a power amplifier to increase or decrease the transmitted RF power. Adjusting transmitted RF power is useful for several purposes. For example, in many types of cellular telecommunications systems, it is useful for transmitted RF power to be higher when the transceiver (also referred to as a handset) is farther from the nearest base station and lower when the transceiver is closer to the nearest base station. Also, in some types of multi-mode (e.g., dual-mode) transceivers, such as those that are capable of operating in accordance with both the GSM (Global System for Mobile telecommunication) standard and EDGE (Enhanced Data rates for GSM Evolution) standard, requirements for transmitted RF power differ depending on whether the transceiver is operating in GSM mode or EDGE mode. Similarly, requirements for transmitted RF power can differ in multi-band (e.g., dual-band) transceivers, such as those that are capable of operating in both a GSM 'low band' frequency band and a GSM 'high band' frequency band. To accommodate different power amplification requirements for multiple bands, the power amplifier system of the transceiver may correspondingly include multiple power amplifiers.
"At least some of the above-referenced transmit power control circuitry is commonly located on an integrated circuit chip or die other than that on which the one or more power amplifiers are located. For example, while the power amplifiers may be located on a chip that is part of a stand-alone or dedicated power amplifier module, the portion of the transmit power control circuitry that generates the gain, bias or other power control signals to be provided as inputs to the power amplifiers may be embodied in processing logic (e.g., of a programmed processor chip) and other circuitry that is part of a baseband circuitry module or a mixed-signal circuitry module. In a complex transmitter, such as a multi-mode, multi-band transmitter having several power amplifiers, there can be a significant number of electrical connections or signal lines that convey the power control signals from the power control circuitry to the power amplifier module. For a number of reasons, it is desirable to minimize the number of such power control signal lines."
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "Embodiments of the invention relate to using a bidirectional serial interface to transfer a digital representation of an analog value from a first chip of a type that processes radio frequency (RF) signals, such as a chip associated with a power amplifier module or front end module, to a second chip in a mobile wireless telecommunication device. The serial interface is of a type that provides a clock signal only during a data transfer operation, i.e., during a read or write operation, and not at other times. In an exemplary embodiment, circuitry on the first chip receives this clock signal from the second chip during the address portion of a read operation and uses this clock signal to generate a conversion clock signal. An analog-to-digital converter (ADC) on the first chip operates in response to the conversion clock signal to convert an analog value to a digital output. Circuitry on the first chip then transfers the digital output of the ADC from the first chip to the second chip via the serial interface.
"Other systems, methods, features, and advantages of the invention will be or become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features, and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims."
URL and more information on this patent, see: Ripley, David S.; Ross, James H.. Data Conversion Using a Serial Interface Clock in a Power Amplifier Module. U.S. Patent Number 8526995, filed
Keywords for this news article include: Telecommunications,
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC
Most Popular Stories
- Slow Week Ahead of December FOMC Meeting
- Hispanics Seek to Grow School Board Members
- GM Bailout Saved 1.2 Million U.S. Jobs, Report Says
- 'Knockout Game': Myth or Menace?
- Questions Remain in Jenni Rivera's Death
- Bitcoin Used to Buy Tesla Car
- Banks Fret as Volcker Vote Approaches
- Paul Walker Fans Pay Respects
- 18 L.A. Sheriff's Deputies Face U.S. Charges
- Yellen Set to Become One of World's Most Powerful Women