Integrated receivers and integrated circuit having integrated inductors

• US 8,494,470 B2
• Filed: 06/15/2011
• Issued: 07/23/2013
• Est. Priority Date: 11/25/2008
• Status: Active Grant

• Current Assignee: Silicon Laboratories Incorporated
• Original Assignee: Silicon Laboratories Incorporated
• Inventors: Khoini-Poorfard, Ramin, Piovaccari, Alessandro, Rafi, Aslamali A., Koroglu, Mustafa H., Trager, David S., Coban, Abdulkerim L.
• Primary Examiner(s): Hernandez, William
• Application Number:
  US13/160,564
• Publication Number:
  US 20110244820A1
• Time in Patent Office: 769 Days
• Field of Search: 455/255, 455/256, 455/266, 455/337, 455/339, 455/340
• US Class Current: 455/266
• CPC Class Codes: H03H 11/04 Frequency selective two-port networks
• CPC Class Codes: H04B 1/28 the receiver comprising at least one semiconductor device having three or more electrodes
• CPC Class Codes: H04B 1/30 for homodyne or synchrodyne receivers demodulator circuits H03D1/22
• CPC Class Codes: H04L 27/148 using filters, including PLL-type filters
• CPC Class Codes: H04N 5/455 Demodulation-circuits
• CPC Class Codes: H04N 5/50 Tuning indicators; Automatic tuning control

Abstract

An integrated wideband receiver includes first and second signal processing paths and a controller. The first signal processing path has an input, and an output for providing a first processed signal, and comprises a first tracking bandpass filter having a first integrated inductor. The second signal processing path has an input, and an output for providing a second processed signal, and comprises a second tracking bandpass filter having a second integrated inductor. The controller is for enabling one of the first and second signal processing paths corresponding to a selected channel of a radio frequency (RF) input signal to provide an output signal. The controller, the first integrated inductor, and said second integrated inductor are formed on a single integrated circuit chip.

Claims

1. An integrated wideband receiver comprising:

a first signal processing path having an input, and an output for providing a first processed signal, and comprising a first tracking bandpass filter having a first integrated inductor;

a second signal processing path having an input, and an output for providing a second processed signal, and comprising a second tracking bandpass filter having a second integrated inductor; and

a controller for enabling one of said first and second signal processing paths corresponding to a selected channel of a radio frequency (RF) input signal to provide an output signal,

wherein said controller, said first integrated inductor, and said second integrated inductor are formed on a single integrated circuit chip, and

wherein said first integrated inductor has a higher inductance than said second integrated inductor, and said second integrated inductor has a higher quality factor than said first integrated inductor.

2. The integrated wideband receiver of claim 1, wherein said controller enables said one of said first and second signal processing paths by selectively coupling said RF input signal to said input of said first signal processing path or to said input of said second signal processing path in response to a channel selection signal.

6. The integrated wideband receiver of claim 1, wherein each of said first and second signal processing paths comprises a variable capacitor in parallel with a corresponding one of said first and second integrated inductors to form corresponding first and second tracking bandpass filters.

7. The integrated wideband receiver of claim 6, wherein each variable capacitor comprises a bank of switched capacitors.

8. The integrated wideband receiver of claim 6, wherein said first signal processing path further comprises:

a mixer having a signal input, a local oscillator input for receiving a local oscillator signal, and an output for providing a converted RF signal; and

a tunable lowpass filter coupled between an output of said first tracking bandpass filter and said signal input of said mixer and having a tuning input for receiving a cutoff frequency signal,

wherein when enabling said first signal processing path, said controller sets said local oscillator signal to tune a desired channel to an intermediate frequency, and sets said cutoff frequency signal to cause said tunable lowpass filter to substantially attenuate frequencies around and higher than a third harmonic of a frequency of said local oscillator signal.

9. The integrated wideband receiver of claim 8, wherein said first signal processing path further comprises:

a local oscillator having a first output for providing said local oscillator signal, said local oscillator signal characterized as being a square wave signal.

10. The integrated wideband receiver of claim 8 further comprising:

an attenuator coupled between said output of said first tracking bandpass filter and said signal input of said mixer.

11. The integrated wideband receiver of claim 1 wherein:

said first integrated inductor comprises a plurality of windings including a first set of concentric windings in a first metal layer adjacent to a second set of concentric windings in said first metal layer.

3. An integrated wideband receiver comprising:

a first signal processing path having an input, and an output for providing a first processed signal, and comprising a first tracking bandpass filter having a first integrated inductor;

a second signal processing path having an input, and an output for providing a second processed signal, and comprising a second tracking bandpass filter having a second integrated inductor; and

a controller for enabling one of said first and second signal processing paths corresponding to a selected channel of a radio frequency (RF) input signal to provide an output signal,

wherein said controller, said first integrated inductor, and said second integrated inductor are formed on a single integrated circuit chip, and

wherein said first integrated inductor comprises one or more windings formed in a plurality of metal layers, and said second integrated inductor comprises one or more windings formed only in a single metal layer.

4. The integrated wideband receiver of claim 3, wherein said first integrated inductor has a greater number of windings than said second integrated inductor, and said second integrated inductor has a greater winding width than said first integrated inductor.

5. The integrated wideband receiver of claim 3, wherein said single metal layer comprises a top metal layer.

12. An integrated wideband receiver comprising:

a first signal processing path having an input, and an output for providing a first processed signal, and comprising a first tracking bandpass filter having a first integrated inductor;

a second signal processing path having an input, and an output for providing a second processed signal, and comprising a second tracking bandpass filter having a second integrated inductor; and

a controller for enabling one of said first and second signal processing paths corresponding to a selected channel of a radio frequency (RF) input signal to provide an output signal,

wherein said controller, said first integrated inductor, and said second integrated inductor are formed on a single integrated circuit chip,

wherein said first integrated inductor has a predetermined planar footprint and is formed with windings in both a first metal layer and a second metal layer, and

wherein said second integrated inductor occupies substantially said predetermined planar footprint and is formed with windings in said first metal layer but not in said second metal layer such that said first integrated inductor has a larger inductance than said second integrated inductor.

13. The integrated wideband receiver of claim 12, wherein said first integrated inductor has a greater number of windings than said second integrated inductor, and said second integrated inductor has a greater winding width than said first integrated inductor.

14. The integrated wideband receiver of claim 12, wherein said first metal layer comprises a top metal layer.

15. The integrated wideband receiver of claim 12, wherein said first integrated inductor includes windings in more than two metal layers.