Filter networks for driving capacitive loads
AssigneeMediaTek Singapore Pte. Ltd.
InventorsBryan Liangchin Huang, Osama Khalil Shanaa
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Abstract
According to at least one aspect, a filter network is provided. The filter network comprises: an active filter comprising an amplifier (e.g., an operational amplifier), wherein the active filter is configured to add at least one member selected from the group consisting of a pole and a zero to a transfer function of the filter network; a passive filter coupled to the active filter and configured to add at least one pole to the transfer function of the filter network; and a non-inverting amplifier (e.g., a voltage buffer) having an input coupled to the passive filter and an output coupled to the active filter.
Claims20
A filter network, comprising:
- an active filter comprising an amplifier, wherein the active filter is configured to add at least one member selected from the group consisting of a pole and a zero to a transfer function of the filter network;
- a passive filter coupled to the active filter and configured to add at least one pole to the transfer function of the filter network;
- and
- a non-inverting amplifier having an input coupled to the passive filter and an output coupled to the active filter.
A filter network, comprising:
- an amplifier having an input and an output;
- a passive filter coupled to the output of the amplifier and configured to add at least one pole to a transfer function of the filter network;
- a voltage buffer having an input coupled to the passive filter and an output coupled to the input of the amplifier;
- and
- a circuit package housing at least the amplifier, the passive filter, and the voltage buffer.
A filter network, comprising:
- an amplifier having an input and an output;
- a passive filter coupled to the output of the amplifier and configured to add at least one pole to a transfer function of the filter network;
- and
- a voltage buffer means having an input coupled to the passive filter and an output coupled to the input of the amplifier.
Dependencies are inferred from the claim text.