Systems and methods for tuning a broadcast radio receiver with digital display

A receiver system, comprising:

• at least one antenna configured to receive radio frequency (RF) signals;
• a tuning mechanism configured to accept RF tuning input from a user;
• a digital display device configured to display the identification of a selected radio frequency;
• integrated receiver circuitry coupled to the antenna, tuning mechanism and digital display, the receiver circuitry comprising:
• on-chip mixer circuitry configured to receive a RF signal provided by the antenna and to mix the RF signal with a local oscillator (LO) signal to produce a downconverted signal,
• at least partially on-chip LO circuitry coupled to provide the LO signal to the mixer to produce the downconverted signal,
• at least one on-chip processing device configured to receive a RF tuning control signal representative of a selected radio frequency input by a user via the tuning mechanism, the processing device being coupled to the LO circuitry and coupled to control the frequency of the LO signal with an oscillator control value operable to downconvert to the selected radio frequency without consideration of a crystal oscillator and without consideration of an external off-chip timing reference, the oscillator control value being selected based at least in part on measured temperature, and
• on-chip memory circuitry coupled to the at least one processing device, the memory circuitry containing oscillator control information that includes the oscillator control value corresponding to the selected radio frequency at the measured temperature,
• wherein the at least one processing device is configured to access the memory circuitry and to select the oscillator control value based at least in part on the measured temperature, and is further configured to output a digital display signal to the digital display device based on the selected radio frequency without consideration of a crystal oscillator and without consideration of an external off-chip timing reference, the digital display signal containing digital display information causing the digital display device to display the identity of the radio frequency of the downconverted signal;
• where the antenna, tuning mechanism and digital display device are configured as off-chip components of the receiver system.

A method of using an integrated circuit to display the identity of a tuned radio frequency, comprising performing the following steps on-chip using circuitry of the integrated circuit:

• receiving a RF tuning control signal, the RF tuning control signal being representative of a selected radio frequency;
• mixing a received RF signal with a local oscillator (LO) signal to produce a downconverted signal;
• in response to the received RF tuning control signal selecting an oscillator control value based at least in part on measured temperature from oscillator control information that includes the oscillator control value corresponding to the selected radio frequency at the measured temperature;
• controlling the frequency of the LO signal with the selected oscillator control value to downconvert the selected radio frequency without consideration of a crystal oscillator and without consideration of an external off-chip timing reference;
• and
• outputting a digital display signal from the integrated circuit based on the selected radio frequency without consideration of a crystal oscillator and without consideration of an external off-chip timing reference, the digital display signal containing digital display information that represents the identity of the radio frequency of the downconverted signal.