FILTERING USING IMPEDANCE TRANSLATOR
First Claim
Patent Images
1. A device including:
- a receiver having a low noise amplifier (LNA), the LNA comprising;
an amplifier configured to operate in an RF domain, to receive a signal containing a component at a reception frequency and a component at a transmission frequency, to amplify the component at the reception frequency, and to output the amplified component at the reception frequency;
a first mixer;
a reactive device connected to the first mixer, the reactive device having a reactance to allow the component at the reception frequency to pass;
a second mixer connected to the output of the amplifier and being configured to mix the amplified component and to output a resulting signal at a base band frequency; and
a switch configured to isolate the first mixer from the RF amplifier when a magnitude of the component at the transmission frequency is below a selected value.
3 Assignments
0 Petitions
Accused Products
Abstract
This disclosure relates to low noise amplifiers (LNAs) and more particularly to LNAs integrated on integrated circuit (IC) chips along with radio frequency (RF) amplifiers. In one implementation, an impedance translator is coupled to an amplifier, the impedance translator to cause the amplifier to selectively amplify the one or more components of a received signal.
6 Citations
20 Claims
-
1. A device including:
-
a receiver having a low noise amplifier (LNA), the LNA comprising; an amplifier configured to operate in an RF domain, to receive a signal containing a component at a reception frequency and a component at a transmission frequency, to amplify the component at the reception frequency, and to output the amplified component at the reception frequency; a first mixer; a reactive device connected to the first mixer, the reactive device having a reactance to allow the component at the reception frequency to pass; a second mixer connected to the output of the amplifier and being configured to mix the amplified component and to output a resulting signal at a base band frequency; and a switch configured to isolate the first mixer from the RF amplifier when a magnitude of the component at the transmission frequency is below a selected value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A device, comprising:
-
an amplifier to receive a signal and to amplify at least one or more components of the received signal; an impedance translator coupled to the amplifier, the impedance translator to enable the amplifier to selectively amplify the one or more components of the received signal; a switch coupled to the impedance translator, the switch to isolate the impedance translator based on the one or more components of the received signal; and an output stage coupled to the amplifier, the output stage to receive the selectively amplified one or more components of the received signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A method, comprising:
-
amplifying at least one or more components of a signal; enabling selective amplification of the one or more components of the signal, the enabling performed by an impedance translator; and isolating the impedance translator based on the one or more components of the signal. - View Dependent Claims (17, 18, 19, 20)
-
Specification