Broadband integrated tuner

• US 8,139,161 B2
• Filed: 06/29/2010
• Issued: 03/20/2012
• Est. Priority Date: 04/21/1995
• Status: Expired due to Fees

• Current Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Original Assignee: CSR Technology Incorporated (Qualcomm, Inc.)
• Inventors: Birleson, S. Vincent, Rotzoll, Robert Rudolf, Taddiken, Albert H., Clayton, Kenneth W.
• Primary Examiner(s): Natnael, Paulos
• Application Number:
  US12/826,498
• Publication Number:
  US 20100265412A1
• Time in Patent Office: 630 Days
• Field of Search: 348/731, 348/725, 348/726, 348/732, 348552-555, 455/179.1, 455/189.1, 455/190.1
• US Class Current: 348/731
• CPC Class Codes: H03D 7/161 all the frequency changers being connected in cascade
• CPC Class Codes: H03J 1/005 in a loop
• CPC Class Codes: H03J 2200/14 Tunable filter in receiver contributing to image rejection
• CPC Class Codes: H03J 7/065 the counter or frequency divider being used in a phase locked loop
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4263 involving specific tuning arrangements, e.g. two tuners
• CPC Class Codes: H04N 5/4446 IF amplifier circuits specially adapted for B&W TV RF amplifiers in general H03F3/189
• CPC Class Codes: H04N 5/455 Demodulation-circuits
• CPC Class Codes: H04N 5/50 Tuning indicators; Automatic tuning control
• CPC Class Codes: H04N 5/52 Automatic gain control
• CPC Class Codes: H04N 5/60 for the sound signals

Abstract

A broadband integrated receiver for receiving input signals and outputting composite video and audio signals is disclosed. The receiver employs an up-conversion mixer and a down-conversion mixer in series to produce an intermediate signal. An intermediate filter between the mixers performs coarse channel selection. The down-conversion mixer may be an image rejection mixer to provide additional filtering.

Claims

1. A receiver comprising:

a first amplifier receiving RF signals, wherein said first amplifier is a low-noise amplifier;

a first mixer having a first input coupled to said first amplifier and a second input coupled to a first reference signal having a first operating frequency, wherein said first mixer is in communication with a first filter;

a second mixer having a first input coupled to an output of said first filter and a second input coupled to a second reference signal having a second operating frequency, wherein said second mixer is in communication with a second amplifier;

a second filter having an input coupled to an output of said second amplifier;

a third amplifier in communication with said second filter; and

a coherent oscillator circuit in communication with an output of said second amplifier, wherein said coherent oscillator circuit is located on said single integrated circuit substrate.