| US 7,460,844 B2 | ||
| High dynamic range time-varying integrated receiver for elimination of off-chip filters | ||
| Alyosha Molnar, Berkeley, Calif. (US); and Rahul Magoon, Irvine, Calif. (US) | ||
| Assigned to Axiom Microdevices, Inc., Irvine, Calif. (US) | ||
| Filed on Jan. 28, 2005, as Appl. No. 11/46,023. | ||
| Claims priority of provisional application 60/539702, filed on Jan. 28, 2004. | ||
| Prior Publication US 2005/0164669 A1, Jul. 28, 2005 | ||
| Int. Cl. H04B 1/26 (2006.01); H04B 1/28 (2006.01) | ||
| U.S. Cl. 455—130 [455/323; 455/333] | 21 Claims |
| 1. A receiver circuit comprising:
a quadrature passive mixer having an input and an output;
one or more output impedances coupled to the output of the quadrature passive mixer wherein an input impedance of the quadrature
passive mixer provides a band-pass response;
a low noise amplifier (LNA) having an input and an output coupled to the quadrature passive mixer, the LNA configured to provide
substantially linear transconductance over a predetermined input range; and
wherein the LNA and the quadrature passive mixer are configured so that a band-pass mixer input impedance response is presented
to the output of the LNA so as to substantially reduce a LNA voltage gain for unwanted signals presented to the LNA input.
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