Back to results
US 11,228,283 B2Granted
Negative impedance circuit for reducing amplifier noise
AssigneeMediaTek Singapore Pte. Ltd.
InventorsTaehoon Jeong, Patrick Cooney
Life of this patent
Estimating the term…
Abstract
A circuit includes a first operational amplifier having an inverting input and a non-inverting input, and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier, a current source controlled by the second operational amplifier, and a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source.
Claims20
A circuit, comprising:
- a first operational amplifier having an inverting input and a non-inverting input;
- a negative resistance circuit connected to the inverting input of the first operational amplifier, the negative resistance circuit comprising:
- a second operational amplifier;
- a current source controlled by the second operational amplifier;
- and
- a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source.
3 more elements
A negative resistance circuit, comprising:
- an operational amplifier;
- a current source controlled by the operational amplifier;
- and
- a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source.
1 more element
Dependencies are inferred from the claim text.