Electron Tube Patents (Class 327/267)
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Patent number: 8116690Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: March 25, 2008Date of Patent: February 14, 2012Assignee: Broadcom CorporationInventors: Ahmadreza Rofougaran, Maryam Rofougaran, Shahla Khorram
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Patent number: 8116677Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: August 24, 2010Date of Patent: February 14, 2012Assignee: Broadcom CorporationInventors: Ahmadreza Rofougaran, Maryam Rofougaran, Meng-An Pan, Hung-Ming Chien, Shahla Khorram, William T. Colleran, Jacob Rael, Masood Syed, Brima Ibrahim, Stephen Wu, Shervin Moloudi
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Patent number: 7558556Abstract: An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.Type: GrantFiled: October 27, 2000Date of Patent: July 7, 2009Assignee: Broadcom CorporationInventors: Shervin Moloudi, Maryam Rofougaran
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Patent number: 6222393Abstract: A circuit for generating a pulse signal in response to an input signal. The circuit provides a pulse width for the pulse signal. A first logic device receives the input signal and generates a first intermediate signal. A delay device is coupled to the first logic device and receives the first intermediate signal. The delay device generates a second intermediate signal in response to the first intermediate signal after a period of time. The second intermediate signal has the same state as the second intermediate signal. A second logic device is coupled to both the first logic device and the delay device. The second logic device generates the pulse signal in response to the first intermediate signal.Type: GrantFiled: July 20, 1999Date of Patent: April 24, 2001Assignee: Cypress Semiconductor CorporationInventors: Shailesh Shah, Gregory J. Landry
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Patent number: 5625312Abstract: A control circuit for an insulated-gate semiconductor device (IGBT) 1 has a drive circuit 2, which is a series circuit constructed of an npn transistor 3 and a pnp transistor 4, and controls the switching operation of the IGBT 1 in response to an on/off signal 9S from a switching signal source 9. The control circuit includes a switching speed control means 10, a gate potential stabilizing npn transistor 20, and a stable operation extending means 30. The switching speed control means 10 gives predetermined slops to the rise and fall of the on/off signal 9S. The gate potential stabilizing npn transistor 20 is Darlington-connected to the pnp transistor 4 of the drive circuit 2 and has the emitter thereof connected to the source of the IGBT 1. The stable operation extending means 30 generates an on signal to the base of the gate potential stabilizing npn transistor 20 upon sensing a drop in the gate potential of the IGBT 1 to a threshold voltage thereof or less.Type: GrantFiled: June 28, 1995Date of Patent: April 29, 1997Assignee: Fuji Electric Co., Ltd.Inventors: Hiroyuki Kawakami, Noriho Terasawa