Adaptive radio transceiver with noise suppression

• US 20050186917A1
• Filed: 04/19/2005
• Published: 08/25/2005
• Est. Priority Date: 10/21/1999
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Ahmadreza Rofougaran, Hung-Ming Chien, Maryam Rofougaran, Meng-An Pan
• Inventors: Pan, Meng-An, Rofougaran, Maryam, Chien, Hung-Ming, Rofougaran, Ahmadreza
• Granted Patent: US 7,136,622 B2
• Time in Patent Office: Days
• US Class Current: 455/73
• CPC Class Codes: H03F 3/245 with semiconductor devices only
• CPC Class Codes: H03F 3/45183 Long tailed pairs H03F3/4521, H03F3/45237 take precedence
• CPC Class Codes: H03F 3/45475 using IC blocks as the active amplifying circuit
• CPC Class Codes: H03H 11/126 using a single operational amplifier H03H11/1204 takes precedence; parallel-T filters H03H11/1295
• CPC Class Codes: H03H 11/1291 Current or voltage controlled filters
• CPC Class Codes: H03H 2011/0494 Complex filters
• CPC Class Codes: H03H 21/0001 Analogue adaptive filters
• CPC Class Codes: H03H 21/0012 Digital adaptive filters
• CPC Class Codes: H03J 2200/10 Tuning of a resonator by means of digitally controlled capacitor bank
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04B 17/14 of the whole transmission and reception path, e.g. self-test loop-back

Abstract

An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims.

Claims

1. A circuit, comprising:

a logic circuit having a power input and a power return;

a capacitor coupled across the power input and power return;

a first resistor having a first end coupled to the power input and a second end to couple to a power source; and

a second resistor having a first end coupled to the power return and a second end to couple to a power source return.

2-26. -26. (canceled)