Patent ID: 7755426

Claim:
A high bandwidth, fine granularity variable gain amplifier (“VGA”) comprising: an attenuator, the attenuator comprising at least one pair of attenuator differential input nodes and at least one pair of attenuator differential output nodes; a gain block, the gain block comprising at least one pair of gain block differential input nodes coupled to the at least one pair of attenuator differential output nodes and at least one pair of gain block differential output nodes; and a gain adjustment control configured to adjust a gain of the gain block, wherein the attenuator comprises: the at least one pair of attenuator differential input nodes including a positive attenuator input node and a negative attenuator input node; the at least one pair of attenuator differential output nodes including a positive attenuator output node and a negative attenuator output node; at least a first resistive element coupled between the positive attenuator input node and the positive attenuator output node; and at least a second resistive element coupled between the negative attenuator input node and the negative attenuator output node.