Vector sum circuit and phase controller using the same
AssigneesSamsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
InventorsSungku Yeo, Gwanghyeon Jeong, Songcheol Hong, Jaeseok Park, Seunghun Wang, Youngho Ryu, Junhan Lim
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Abstract
A vector sum circuit and a phase controller including the vector sum circuit are provided. The vector sum circuit includes an amplifier configured to amplify an input orthogonal signal by using a first metal oxide semiconductor field effect transistor (MOSFET), and a self body-biasing circuit comprising a resistor. The self body-biasing circuit is configured to connect a drain and a body of the first MOSFET to reduce a voltage connected to the body as a current at the drain increases.
Claims7
A vector sum circuit comprising:
- an amplifier configured to amplify an orthogonal signal by using a first metal oxide semiconductor field effect transistor (MOSFET);
- a self body-biasing circuit comprising a resistor
- configured to connect a drain and a body of the first MOSFET to reduce a voltage applied to the body as a current at the drain increases;
- and
- an amplification controller configured to control a tail current of the amplifier,
- wherein the amplifier controller comprises a second MOSFET and a switch, and
- wherein the switch is configured to provide an output of a current mirror circuit interlocked with an output of a digital-to-analog converter (DAC) to a gate of the second MOSFET.
Dependencies are inferred from the claim text.