Patents by Inventor Kimia Taghizadeh Ansari
Kimia Taghizadeh Ansari has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11012113Abstract: A variable loss attenuator is provided. Two or more controllable stages each include a differential or single-ended ? network. Each ? network includes one or more series elements connected in series between the signal input and the signal output. Each series element includes a series transistor, which may potentially be provided without an inductor in parallel. Each ? network includes a plurality of shunt elements each including at least one respective shunt transistor. An input stage connects to the first controllable stage and an output stage connects from the last controllable stage. Intermediate stages connect the controllable stages to one another. Each of the input stage, output stage, and intermediate stages include a right-handed transmission line component and coupled between the signal input and a first one of the controllable stages. Shunt inductors are located at inputs and outputs of each of the controllable stages.Type: GrantFiled: September 28, 2018Date of Patent: May 18, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Kimia Taghizadeh Ansari, Tyler Neil Ross
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Patent number: 10630237Abstract: A standing wave oscillator is described. The standing wave oscillator includes a transmission line, and an even number of gain stages. Each gain stage is connected to the transmission line, and each gain stage is located at a respective location along a length of the transmission line. The gain stages are configured to generate a standing wave oscillator signal along the length of the transmission line, when a supply voltage is applied to at least one end of the transmission line. The location of each gain stage is non-coincidental with an expected location of maximum amplitude of the standing wave oscillator signal.Type: GrantFiled: May 8, 2018Date of Patent: April 21, 2020Assignee: Huawei Technologies Co., Ltd.Inventors: Tyler Neil Ross, Kimia Taghizadeh Ansari
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Publication number: 20200106476Abstract: A variable loss attenuator is provided. Two or more controllable stages each include a differential or single-ended ? network. Each ? network includes one or more series elements connected in series between the signal input and the signal output. Each series element includes a series transistor, which may potentially be provided without an inductor in parallel. Each ? network includes a plurality of shunt elements each including at least one respective shunt transistor. An input stage connects to the first controllable stage and an output stage connects from the last controllable stage. Intermediate stages connect the controllable stages to one another. Each of the input stage, output stage, and intermediate stages include a right-handed transmission line component and coupled between the signal input and a first one of the controllable stages. Shunt inductors are located at inputs and outputs of each of the controllable stages.Type: ApplicationFiled: September 28, 2018Publication date: April 2, 2020Applicant: Huawei Technologies Co., Ltd.Inventors: Kimia TAGHIZADEH ANSARI, Tyler Neil ROSS
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Publication number: 20190348948Abstract: A standing wave oscillator is described. The standing wave oscillator includes a transmission line, and an even number of gain stages. Each gain stage is connected to the transmission line, and each gain stage is located at a respective location along a length of the transmission line. The gain stages are configured to generate a standing wave oscillator signal along the length of the transmission line, when a supply voltage is applied to at least one end of the transmission line. The location of each gain stage is non-coincidental with an expected location of maximum amplitude of the standing wave oscillator signal.Type: ApplicationFiled: May 8, 2018Publication date: November 14, 2019Inventors: Tyler Neil Ross, Kimia Taghizadeh Ansari
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Patent number: 10418973Abstract: A control circuit is disclosed for controlling operation of a radio frequency (RF) transistor. The control circuit has a first sub-circuit that accepts a reference voltage and a reference current. The control circuit has a second sub-circuit with a plurality of stacked transistors coupled between the first sub-circuit and ground, and a resistor ladder coupled between the first sub-circuit and an output port of the control circuit. The first sub-circuit provides the reference current to flow through the stacked transistors, and sets a total voltage drop across the stacked transistors equal to the reference voltage. The first sub-circuit also sets a total voltage drop across the resistor ladder equal to the reference voltage. Each rung of the resistor ladder is coupled to control an operating voltage of a stacked transistor, to cause each stacked transistor to operate with similar control conditions.Type: GrantFiled: November 9, 2017Date of Patent: September 17, 2019Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Samuel Alfred Tiller, Kimia Taghizadeh Ansari, Tyler Neil Ross
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Patent number: 10367466Abstract: Hybrid variable gain amplifiers and methods of controlling hybrid VGAs are disclosed. The hybrid VGA includes a first portion that provides a current path between a positive input and a positive output, and a current path either between the positive input and a negative output, in a first mode of operation, or between the positive input and a voltage source, in a second mode of operation. A second portion of the VGA provides a current path between a negative input and the negative output, and a current path either between the negative input and the positive output, in the first mode of operation, or between the negative input and the voltage source, in the second mode of operation. Control voltages selectively enable the paths in the first or second mode of operation. The control voltages further control amount of current flow in the enabled paths.Type: GrantFiled: November 3, 2017Date of Patent: July 30, 2019Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Kimia Taghizadeh Ansari, Tyler Neil Ross
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Publication number: 20190140609Abstract: Hybrid variable gain amplifiers and methods of controlling hybrid VGAs are disclosed. The hybrid VGA includes a first portion that provides a current path between a positive input and a positive output, and a current path either between the positive input and a negative output, in a first mode of operation, or between the positive input and a voltage source, in a second mode of operation. A second portion of the VGA provides a current path between a negative input and the negative output, and a current path either between the negative input and the positive output, in the first mode of operation, or between the negative input and the voltage source, in the second mode of operation. Control voltages selectively enable the paths in the first or second mode of operation. The control voltages further control amount of current flow in the enabled paths.Type: ApplicationFiled: November 3, 2017Publication date: May 9, 2019Inventors: Kimia Taghizadeh Ansari, Tyler Neil Ross
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Publication number: 20190140623Abstract: A control circuit is disclosed for controlling operation of a radio frequency (RF) transistor. The control circuit has a first sub-circuit that accepts a reference voltage and a reference current. The control circuit has a second sub-circuit with a plurality of stacked transistors coupled between the first sub-circuit and ground, and a resistor ladder coupled between the first sub-circuit and an output port of the control circuit. The first sub-circuit provides the reference current to flow through the stacked transistors, and sets a total voltage drop across the stacked transistors equal to the reference voltage. The first sub-circuit also sets a total voltage drop across the resistor ladder equal to the reference voltage. Each rung of the resistor ladder is coupled to control an operating voltage of a stacked transistor, to cause each stacked transistor to operate with similar control conditions.Type: ApplicationFiled: November 9, 2017Publication date: May 9, 2019Inventors: Samuel Alfred Tiller, Kimia Taghizadeh Ansari, Tyler Neil Ross