Back to results
US 8,576,343 B2Granted
Digital signal processor (DSP) architecture for a hybrid television tuner
AssigneeSilicon Laboratories Inc.
InventorsAlan Hendrickson, David Trager, Mitch Reid, Li Gao, John Khoury
Life of this patent
Estimating the term…
Abstract
According to one aspect, a mixed-signal tuner for analog and digital TV reception incorporates a demodulator for analog TV, employing various features for resolving limitations of the analog circuitry and for achieving compatibility with various global TV standards. Such features, which may be present in one or more embodiments, include the use of a variable sample rate in all digital clocks for frequency planning, and use of a microcontroller (MCU) to control various circuitry of the tuner.
Claims22
An apparatus comprising:
- a digital signal processor (DSP) to perform a plurality of DSP operations on an incoming signal, wherein the DSP is to perform the DSP operations in a first order if the incoming signal is an analog TV (ATV) signal and is to perform the DSP operations in a second order if the incoming signal is digital TV (DTV) signal, wherein the DSP is reconfigurable under control of a microcontroller to perform the DSP operations in the first order and the second order based on the incoming signal, to handle a plurality of TV standards;
- and
- the microcontroller coupled to the DSP to configure the first order and the second order based on the incoming signal, determine an operating mode and configure the DSP based on the operating mode, and control channel selection, sample rate selection, and gain control of the DSP.
A television tuner comprising:
- an analog front end to receive and downconvert a radio frequency (RF) signal to an intermediate frequency (IF) signal, the RF signal to be one of an analog TV (ATV) signal and a digital TV (DTV) signal, and according to one of a plurality of global standards;
- a digital signal processor (DSP) coupled to the analog front end to downconvert the IF signal to a zero intermediate frequency (ZIF) signal and to perform a set of functions on the ZIF signal using a reconfigurable set of blocks configured in a first order if the RF signal is an ATV signal and to perform a second set of functions on the ZIF signal using the reconfigurable set of blocks configured in a second order if the RF signal is a DTV signal, wherein the DSP is to demodulate the ATV signal;
- and
- a microcontroller coupled to the DSP to configure the first order and the second order based on the type of RF signal, and to calibrate functions of the analog front end, determine operating mode and configure the DSP based on the operating mode, and control RF channel selection, sample rate selection, and gain control of the analog front end and the DSP.
1 more element
A method comprising:
- receiving a radio frequency (RF) signal in an analog front end of a television tuner and downconverting the RF signal to an intermediate frequency (IF) signal, the RF signal one of an analog TV (ATV) signal and a digital TV (DTV) signal;
- downconverting the incoming signal in a digital signal processor (DSP) coupled to the analog front end to downconvert the IF signal to a zero intermediate frequency (ZIF) signal and performing a set of functions on the ZIF signal using a reconfigurable set of blocks configured in a first order if the RF signal is an ATV signal and performing a second set of functions on the ZIF signal using the reconfigurable set of blocks configured in a second order if the RF signal is a DTV signal;
- and
- configuring the first order and the second order based on the type of RF signal in a microcontroller coupled to the DSP.
1 more element
Dependencies are inferred from the claim text.