Patent application number | Description | Published |
20080315954 | Integrated Power Amplifier - Methods to implement low cost, high efficiency, low loss power combiner with novel matching circuits are disclosed. A narrow band power combiner enables a high power and high efficiency radio frequency power amplifier to be realized using multiple low voltage CMOS transistors or micro power amplifiers. The power combiner may be printed on a package substrate and realized either using single layer substrate through edge coupling or multiple layers substrate through broadside coupling. The micro power amplifiers may be fabricated using low voltage CMOS technology and electrical connections between the outputs from the micro power amplifiers and the power combiner may be provided through stud bumps in a flip chip technology. With the tunable matching circuits, the present invention allows the narrow band power combiner to be tuned to different frequencies. | 12-25-2008 |
20090096525 | Power amplifier - Methods to implement power control in a digital power amplifier are described. | 04-16-2009 |
20100007423 | INTEGRATED POWER AMPLIFIER - Methods to implement low cost, high efficiency, low loss power combiner with novel matching circuits are disclosed. A narrow band power combiner enables a high power and high efficiency radio frequency power amplifier to be realized using multiple low voltage CMOS transistors or micro power amplifiers. The power combiner may be printed on a package substrate and realized either using single layer substrate through edge coupling or multiple layers substrate through broadside coupling. The micro power amplifiers may be fabricated using low voltage CMOS technology and electrical connections between the outputs from the micro power amplifiers and the power combiner may be provided through stud bumps in a flip chip technology. With the tunable matching circuits, the present invention allows the narrow band power combiner to be tuned to different frequencies. | 01-14-2010 |
20100271131 | INTEGRATED POWER AMPLIFIER - Methods to implement low cost, high efficiency, low loss power combiner with novel matching circuits are disclosed. A narrow band power combiner enables a high power and high efficiency radio frequency power amplifier to be realized using multiple low voltage CMOS transistors or micro power amplifiers. The power combiner may be printed on a package substrate and realized either using single layer substrate through edge coupling or multiple layers substrate through broadside coupling. The micro power amplifiers may be fabricated using low voltage CMOS technology and electrical connections between the outputs from the micro power amplifiers and the power combiner may be provided through stud bumps in a flip chip technology. With the tunable matching circuits, the present invention allows the narrow band power combiner to be tuned to different frequencies. | 10-28-2010 |
20110249770 | PASSIVE TRANSMITTER ARCHITECTURE WITH SWITCHABLE OUTPUTS FOR WIRELESS APPLICATIONS - A transmitter architecture having a single signal path or hardware to cover WCDMA/EDGE/GSM applications, and requires no SAW at the transmitter outputs. The transmitter architecture allows for a transmit convergence feature. A passive mixer with unique driver and furthermore using native devices available from the CMOS process for the mixer cores enables low voltage and low power design, low output noise and high linearity. A digital variable gain amplifier has the capability to cover wide output dynamic range operated from low supply voltage and interfaced digitally with the baseband circuit without DAC. A single transformer is used to combine the outputs from the WCDMA/EDGE and GSM drivers and subsequently convert the differential signal paths into a single-ended signal. RF switches are used to divert the output from the transformer to different bands and applications. | 10-13-2011 |
20120256669 | DUTY CYCLE CORRECTION - Method and circuitry for controlling duty cycle of an input signal towards a desired value comprising a sequence of at least two inverters arranged in series and feedback circuitry. A first inverter is arranged to receive the input signal and a last inverter is arranged to output a signal having the same frequency as the input signal. The output signal is an adjusted version of the input signal. The feedback circuitry is arranged to receive the output signal and comprises a comparing and supplying means. The comparing means compares the output signal with a reference signal indicative of a desired value and generates a feedback signal based on the comparison of the output and reference signal. The supplying means supplies the feedback signal to adjust operating conditions of at least one of the inverters, such that the duty cycle of the output signal is controlled towards the desired value. | 10-11-2012 |
20120256676 | MIXER CIRCUIT - A driver circuit for supplying a drive signal to a mixer circuit comprising a first and second circuit branch and an operational amplifier. The first circuit branch receives an input signal and a bias signal. The second circuit branch receives the input signal. The operational amplifier has a first input connected to a junction node of the first circuit branch and a second input connected to a junction node of the second circuit branch. The operational amplifier is arranged to provide an operational amplifier output signal a second component of the second circuit branch so that a voltage at the junction node of the second circuit branch is equal to a voltage at the junction node of the first circuit branch. The voltage is dependent on the input signal and providing the drive signal. | 10-11-2012 |
20120268190 | LOCAL OSCILLATOR CLOCK SIGNALS - An apparatus and method for generating complementary periodic signals for a mixer circuit is provided. The apparatus comprises first and second generation circuits each for generating a periodic signal with a transition time on each rising edge different than a transition time on each falling edge. Each of the first and second generation circuits has an output for supplying its periodic signal to a mixer such that each rising edge of a periodic signal from one of the circuits crosses each falling edge of a periodic signal from the other of the circuits at a crossing point below a turn on voltage of the mixer. | 10-25-2012 |