Termination circuits and attenuation methods thereof
AssigneeMarvell Asia Pte Ltd
InventorsYida Duan, Karthik Raviprakash, Parmanand Mishra
Life of this patent
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Abstract
The present invention is directed to communication systems and electrical circuits. According to an embodiment, the present invention provides a termination circuit that includes an inductor network. The inductor network is coupled to a termination resistor and a capacitor network, which includes a first capacitor and a second capacitor. The termination resistor, the first capacitor, and the second capacitor are adjustable, and they affect attenuation of the termination circuit. There are other embodiments as well.
Claims15
A termination circuit for receiving a signal from a communication channel, the termination circuit comprising:
- an inductor network including first and second inductors connected to each other in series to a node, the inductor network configured to receive the signal from the communication channel;
- a capacitor network comprising a plurality of capacitors connected to the inductor network, one or more of the plurality of capacitors being configured to provide a variable capacitance, a first variable capacitor of the capacitor network with a first end directly connected to the node and a second end directly connected to an output of the termination circuit;
- a termination resistor connected to the inductor network and ground, the termination resistor being configured to provide variable resistance and to adjust an impedance characteristic of the termination circuit;
- and
- circuitry configured to output one or more control signals to at least one of the capacitor network and the termination resistor to vary at least one of the termination resistor and the one or more of the plurality of capacitors to adjust a parameter of the signal received from the communication channel.
Dependencies are inferred from the claim text.