Voltage mode differential driver and method
AssigneeBroadcom Corporation
InventorsNing Li, Jiann-Chyi (Sam) Shieh
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Abstract
A differential driver includes a switching module and first and second voltage controlled voltage sources. The switching module has a plurality of switches each controlled by an input signal, a first voltage input and a second voltage input, and a signal output. The first voltage controlled voltage source is connected to the first voltage input. The first voltage controlled voltage source has a low impedance. The second voltage controlled voltage source is connected to the second voltage input. The second voltage controlled voltage source also has a low impedance. The switching circuit outputs an output signal having an output voltage and current controlled by the first and second voltage controlled voltage sources. The output signal is based upon the input signal.
Claims32
A differential driver comprising:
- a switching module having a plurality of switches each controlled by an input signal, a first voltage input and a second voltage input;
- a first source follower circuit connected to said first voltage input;
- and
- a second source follower circuit connected to said second voltage input;
- wherein said switching module outputs an output signal having an output voltage and current controlled by said first and second voltage controlled voltage sources.
A method of driving a signal, said method comprising:
- providing a switching module having a first and second voltage input and a signal input, and a signal output, said signal input being connected to a plurality of switches in order to control an operation of said switches, and said signal output being connected to said first and second voltage inputs;
- providing a first source follower circuit having a first voltage output;
- providing a second source follower circuit having a second voltage output;
- connecting said first voltage output of said first source follower circuit to said first voltage input of said switching module;
- and
- connecting said second voltage output of said second source follower circuit to said second voltage input of said switching module.
A differential driver comprising:
- a switching means for switching a plurality of switches in order to produce a signal output based on an input signal, a first and second voltage input;
- a first source follower means for generating a first voltage output as said first voltage input to said switching means;
- and
- a second source follower means for generating a second voltage output as said second voltage input to said switching means.
Dependencies are inferred from the claim text.