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US 2020/0177130 A1Published application
Zero if transmitter with decoupling between mixer and programmable gain stage
AssigneeTexas Instruments Incorporated
InventorsRahul SHARMA, Jagannathan VENKATARAMAN, Eeshan MIGLANI, Sandeep Kesrimal OSWAL
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Abstract
A system includes a Zero IF transmitter having a mixer and a programmable gain stage. The Zero IF transmitter also includes an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.
Claims21
A system, comprising:
- a Zero IF transmitter having:
- a mixer;
- a programmable gain stage;
- and
- an intermediate stage between the mixer and the programmable gain stage, wherein the intermediate stage is configured to decouple the mixer and the programmable gain stage.
2 more elements
A Zero IF transmitter circuit, comprising:
- a mixer;
- an intermediate stage coupled to an output of the mixer;
- and
- a programmable gain stage coupled to an output of the intermediate stage, wherein the intermediate stage comprises a decoupling circuit.
1 more element
A Zero IF transmitter circuit, comprising:
- a mixer;
- an intermediate stage coupled to an output of the mixer;
- and
- a programmable gain stage coupled to an output of the intermediate stage, wherein the intermediate stage comprises a decoupling circuit having:
- a first transistor;
- and
- a second transistor, wherein a first current terminal of the first transistor is coupled to the programmable gain stage, wherein a second current terminal of the first transistor is coupled to a first mixer output node, and wherein a control terminal of the first transistor is coupled to the second current terminal of the second transistor via a first capacitor, and
- wherein a first current terminal of the second transistor is coupled to the programmable gain stage, wherein a second current terminal of the second transistor is coupled to a second mixer output node, and wherein a control terminal of the second transistor is coupled to the second current terminal of the first transistor via a second capacitor.
5 more elements
Dependencies are inferred from the claim text.