Single chip for generating multiple differential signals and loop-through signals according to a single-ended RF signal
AssigneeRafael Microelectronics, Inc.
InventorsKuan-Ming Chen, Yun-Yi Chen, Tzu-Yun Wang
Life of this patent
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Abstract
A single chip for generating multiple differential signals and loop-through signals according to a single-ended RF signal inputted to the single chip, wherein delays between different channels of the multiple differential signals and loop-through signals can be minimized for supporting picture-in-picture applications; in addition, the single chip can integrate a power detector and an AGC circuit for controlling the gain of an LNA inside the single chip, and the gain of the LNA can be outputted from the single chip for different usages.
Claims8
A single chip for generating multiple differential signals and loop-through signals according to a single-ended RF signal, said single chip comprising:
- a first amplifier, wherein a first terminal of the first amplifier is coupled to a first pin of the single chip for receiving the first single-ended RF signal, and a second terminal of the first amplifier outputs a second single-ended RF signal according to the first single-ended RF signal;
- a first single-ended to differential amplifier, wherein a first terminal of the first single-ended to differential amplifier is coupled to the second terminal of the first amplifier to receive the second single-ended RF signal, and a second terminal and a third terminal of the first single-ended to differential amplifier outputs a first pair of differential RF signals according to the second single-ended RF signal, wherein the second terminal and the third terminal of the first single-ended to differential amplifier are coupled to a second pin and a third pin of the single chip, respectively;
- a second single-ended to differential amplifier, wherein a first terminal of the second single-ended to differential amplifier is coupled to the second terminal of the first amplifier to receive the second single-ended RF signal, and a second terminal and a third terminal of the second single-ended to differential amplifier outputs a second pair of differential RF signals according to the second single-ended RF signal, wherein the second terminal and the third terminal of the second single-ended to differential amplifier are coupled to a fourth pin and a fifth pin of the single chip, respectively;
- a second amplifier, wherein a first terminal of the second amplifier is coupled to the second terminal of the first amplifier to receive the second single-ended RF signal, and a second terminal of the second amplifier is coupled to a sixth pin of the single chip to output a third single-ended RF signal according to the second single-ended RF signal;
- and
- a third amplifier, wherein a first terminal of the third amplifier is coupled to the second terminal of the first amplifier to receive the second single-ended RF signal, and a second terminal of the third amplifier is coupled to a seventh pin of the single chip to output a fourth single-ended RF signal according to the second single-ended RF signal.
Dependencies are inferred from the claim text.