摘要:
Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The power amplifier may include a power transistor circuitry having plurality of power transistors and shunt-series circuitry (L1C1, L2C2), a broadband combiner having Chireix compensation elements, and an impedance matching filter. In one embodiment, the power amplifier is implemented in a real switch-mode to facilitate integration of the Chireix compensation elements so as to make the Chireix power amplifier tunable. A method of driving Chireix power amplifier structure is also described. In some embodiments, a variable supply voltage may power the transistor circuitry based on the desired output power of the Chireix power amplifier. In some embodiments, the variable supply voltage may depend upon an out-phasing angle between the two drivers in the transistor circuitry.
摘要:
Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The power amplifier may include a power transistor circuitry having plurality of power transistors and shunt-series circuitry (L1C1, L2C2), a broadband combiner having Chireix compensation elements, and an impedance matching filter. The power transistor circuitry, the broadband combiner, and the impedance matching filter are integrated in a unified package. In one embodiment, the power amplifier is implemented in a real switch-mode to facilitate integration of the Chireix compensation elements so as to make the Chireix power amplifier tunable. A method of driving Chireix power amplifier structure is also described.
摘要:
A pre-driver for an amplifier comprising a load network in which the following elements are connected in the following order: a resistor-an inductor-a capacitor. Also described are a power amplifier comprising such a pre-driver, a method of fabricating a pre-driver for an amplifier, and a method of performing power amplification.
摘要:
A power amplifier, for example a class-E switching power amplifier, and corresponding method, comprising: a plurality of power transistors (16), for example twelve power transistors, providing a partitioned power transistor; and a voltage sensing module (22), comprising for example voltage dividers and inverters, digitally sensing the drain voltage (2) of the partitioned power transistor to control the number of power transistors of the plurality of power transistors (16) that are switched on or off thereby controlling the drain voltage (2) which is varying for example due to antenna mismatch. The power amplifier may further comprise a memory (24) coupled to the voltage sensing module (22) for storing a history of the drain voltage (2), e.g. a history of antenna mismatch.
摘要:
A power amplifier, for example a class-E switching power amplifier, and corresponding method, comprising: a plurality of power transistors (16), for example twelve power transistors, providing a partitioned power transistor; and a voltage sensing module (22), comprising for example voltage dividers and inverters, digitally sensing the drain voltage (2) of the partitioned power transistor to control the number of power transistors of the plurality of power transistors (16) that are switched on or off thereby controlling the drain voltage (2) which is varying for example due to antenna mismatch. The power amplifier may further comprise a memory (24) coupled to the voltage sensing module (22) for storing a history of the drain voltage (2), e.g. a history of antenna mismatch.
摘要:
A system and method for monitoring a premise in case of an emergency and enabling 2-way voice communications with an individual at every possible location within the monitored premises. The system utilizes a radio frequency 2-way wireless communication link from a centrally located Base Alarm Control Unit on the premise to plurality of Remote Alarm Control Units situated throughout the premise. Remote Alarm Control Units relay the information received from the wireless remote transmitters to the Base Alarm Control Unit thereby increasing the effective useful range of the wireless communication link. The same also establishes a 2-way voice connection between the Central Station operator and the individual who may be located at any possible location within the premise, thereby providing a much more effective handling of the emergency or alarm situation.
摘要:
A frequency divider comprising, a first latch circuit (10) and a second latch circuit (10), the second latch circuit (10′) being crossed-coupled to the first latch circuit (10). Each latch (10; 10′) comprises a respective sense amplifier coupled to a respective latch (11). The sense amplifiers comprise a first clock input for receiving a first clock signal (f, f) and 5 respective complementary first clock signal having a first frequency. The latches (11) comprise a second clock input (2f; 2f) for receiving a second clock signal and respective complementary second clock signal having a second frequency, the second frequency being substantially double the first frequency.
摘要:
An power stage has a differential output stage 2 driven by one or more buffer stages 4. The buffer stages 4 are implemented as high and low side buffers 12,14, each of which is itself a differential buffer implemented using transistors formed in an isolated-well technology such as triple-well CMOS.
摘要:
An power stage has a differential output stage 2 driven by one or more buffer stages 4. The buffer stages 4 are implemented as high and low side buffers 12,14, each of which is itself a differential buffer implemented using transistors formed in an isolated-well technology such as triple-well CMOS.
摘要:
A system and method for monitoring a premise in case of an emergency and enabling 2-way voice communications with an individual at every possible location within the monitored premises. The system utilizes a radio frequency 2-way wireless communication link from a centrally located Base Alarm Control Unit on the premise to plurality of Remote Alarm Control Units situated throughout the premise. Remote Alarm Control Units relay the information received from the wireless remote transmitters to the Base Alarm Control Unit thereby increasing the effective useful range of the wireless communication link. The same also establishes a 2-way voice connection between the Central Station operator and the individual who may be located at any possible location within the premise, thereby providing a much more effective handling of the emergency or alarm situation.