Patent application number | Description | Published |
20090051429 | HIGH RESOLUTION VARIABLE GAIN CONTROL - A gain circuit includes an analog section with variable gain and a digital section with variable gain. The gain steps for the digital section have a higher resolution than the gain steps for the analog section. In some implementations, gain steps can be achieved much finer than 0.1 db or less without sensitivity to device tolerances. | 02-26-2009 |
20090058531 | VARIABLE GAIN AMPLIFIER - Techniques and systems for receiving a signal at a first component with an adjustable gain, and adjusting the gain of the first component to a first gain value using a first gain step. Amplifying the signal with the first gain value, generating a first amplified signal, and receiving the first amplified signal at a second component with an adjustable gain. Adjusting a gain of the second component to a second gain value using a second gain step. The net gain step is smaller than one of the first or second gain step. Amplifying the first amplified signal with the second gain value to generate a second amplified signal, and receiving the second amplified signal at a filtering component. A transient response introduced by the filtering component on the second amplified signal is smaller than the transient response that would be introduced by the filtering component on the first amplified signal. | 03-05-2009 |
20090079611 | ADC USE WITH MULTIPLE SIGNAL MODES - A signal is received and whether a signal mode of the signal is a first signal mode or a second signal mode is determined. A gain of a variable gain amplifier is adjusted to a first gain value if the signal mode of the signal is determined to be the first signal mode or a second gain value if the signal mode of the signal is determined to be the second signal mode. The signal is amplified with the variable gain amplifier by the first gain value or the second gain value. The signal is converted to a digital signal with an analog to digital converter after the signal is amplified with the variable gain amplifier by the first gain value or the second gain value. | 03-26-2009 |
20090085668 | Inductor Sharing in Radio Frequency Communications - Two or more low noise amplifiers are configured to amplify received radio frequency input signals and one or more shared load or source degeneration inductors are configured to be used for each of the two or more low noise amplifiers. Further, the one or more shared inductors can be configured to be used for processing two or more signal bands in a multi-band communication system. | 04-02-2009 |
20090086806 | TIME VARYING EQUALIZATION - In some implementations, a signal is received at a device and a gain change is detected in a component of the device that affects the signal. A state of an equalizer is adjusted in response to the detected gain change to a first state that reduces transient effects introduced into the signal by one or more components in the device as a result of the gain change. The signal is equalized using the equalizer with the state set to the first state and the state of the equalizer is adjusted from the first state to a second state while equalizing the signal using the equalizer such that the second state passes the signal through the equalizer substantially unchanged. | 04-02-2009 |
20090088091 | Transmitter for Multiple Standards - Generally, implementations provide a circuit framework that uses phase and amplitude modulation with several voltage-controlled-oscillators (VCOs) and corresponding variable gain amplifiers (VGAs) to generate and amplitude and phase modulated signals that are summed to an output signal for a transmitter circuit. The implementations can involve decomposing an input signal into a number of decomposed signals using a signal decomposer component, in which each of decomposed signals includes phase and amplitude information. The signal decomposer component can interact with each of the VCOs and corresponding VGAs to conduct the phase and amplitude modulation for the amplitude and phase modulated signals. The multiple standard transmitter circuit can be used for one or more communication standards, such as Global System for Mobile Communications (GSM), a Wideband Code Division Multiple Access (WCDMA), or High-Speed Uplink Packet Access (HSUPA), among others. | 04-02-2009 |
20090088106 | RADIO FREQUENCY FILTERING - Radio frequency filtering includes receiving a signal and detecting a change in the direct current (DC) offset of the signal or a change in a component that affects the DC offset of the signal. The filtering also includes setting a cut-off frequency of a high-pass filter to a first frequency value in response to the detected change and filtering the signal using the high-pass filter with the cutoff frequency set to the first frequency value. The filtering further includes adjusting the cutoff frequency of the high-pass filter from the first frequency value to a second frequency value while filtering the signal using the high-pass filter where the second frequency value is less than the first frequency value. | 04-02-2009 |
20090088110 | RADIO FREQUENCY RECEIVER ARCHITECTURE - A radio frequency receiver includes a passive mixer configured to receive and RF signal and a low input impedance circuit configured to receive the output of the passive mixer. | 04-02-2009 |