Filter and associated receiving circuit
AssigneeRealtek Semiconductor Corp.
InventorsYi-Ching Wu, Chia-Jun Chang
Life of this patent
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Abstract
The present invention provides a filter configured to receive an input signal to generate a filtered signal. The filter includes a first component, a first capacitor and a second component. The first component is coupled between the input signal and a first terminal. The first capacitor is coupled between the first terminal and a second terminal. For the second component, a first node of the second component is coupled to the second terminal, and a second node of the second component is used to output the filtered signal. The first component and the second component are inductive components.
Claims8
A filter configured to receive an input signal to generate a filtered signal, comprising:
- a first component, coupled between the input signal and a first terminal;
- a first capacitor, coupled between the first terminal and a second terminal;
- a second component, wherein a first node of the second component is coupled to the second terminal, and a second node of the second component is used to output the filtered signal;
- a third component, coupled between the first terminal and a third terminal, wherein the third component is an inductive component;
- and
- a second capacitor, coupled between the third terminal and a fourth terminal, wherein the fourth terminal is coupled to the second node of the second component, and the fourth terminal is used to output the filtered signal;
- a first resistor, coupled between the second terminal and a ground voltage;
- and
- a second resistor, coupled between the third terminal and the ground voltage;
- wherein the first component and the second component are inductive components.
A receiving circuit positioned in a chip, comprising:
- a filter, configured to receive an input signal to generate a filtered signal, wherein the filter is coupled to a ground voltage, and the ground voltage is connected to an external ground voltage outside the chip through a pad of the chip, and the filter comprises:
- a first component, coupled between the input signal and a first terminal;
- a first capacitor, coupled between the first terminal and a second terminal;
- a second component, wherein a first node of the second component is coupled to the second terminal, and a second node of the second component is used to output the filtered signal, wherein the first component and the second component are inductive components;
- a third component, coupled between the first terminal and a third terminal, wherein the third component is an inductive component;
- and
- a second capacitor, coupled between the third terminal and a fourth terminal, wherein the fourth terminal is coupled to the second node of the second component, and the fourth terminal is used to output the filtered signal;
- a first resistor, coupled between the second terminal and the ground voltage;
- and
- a second resistor, coupled between the third terminal and the ground voltage;
- and
- a mixer, configured to receive the filtered signal, and use an oscillation signal to perform a mixing operation on the filtered signal to generate a mixed signal.
Dependencies are inferred from the claim text.