Frequency synthesizer with ROM controlled divider and display

A frequency synthesizer and control apparatus comprising:

• memory means for receiving a plurality of digital coded input signals and producing different corresponding pluralities of digital coded output signals in response to each different received plurality of coded input signals;
• programmable divider means, included in a phase locked loop means and coupled to said memory means, for receiving said plurality of coded output signals and producing, when enabled, different predetermined frequency divisions in response to each different received plurality of coded output signals, wherein said programmable divider means, when disabled, produces the predetermined division corresponding to the coded output signals received by said programmable divider means when said programmable divider means was last enabled;
• said phase locked loop means producing an output signal having a frequency determined by the frequency division of said programmable divider means;
• display means coupled to said memory means for receiving said plurality of output signals and producing, when enabled, different corresponding predetermined displays in response to each different received plurality of coded output signals, wherein said display means comprises controllable latch means for receiving signals when enabled and storing those received signals when disabled and wherein said display means comprises at least one visual display module driven by said stored signals of said controllable latch means;
• manual tuning means coupled to said memory means for adjustably producing some of said plurality of coded input signals to said memory means;
• and
• control means coupled to said memory means, said manual tuning means, said display means and said programmable divider means for alternately enabling each of said programmable divider means and said display means while the other means is disabled while also correspondingly alternately changing at least one of said plurality of coded input signals to said memory means during the adjusting of said manual tuning means, wherein said control means utilizes the memory means to alternately produce different output control signals to sequentially control both said display means and said programmable divider means to produce a display related to the frequency division implemented by said programmable divider means and thereby eliminate the need for having decoder circuitry preceding said display and programmable divider means, said control means utilizing said memory means to provide one of said plurality of coded output signals to an enabled one of said divider programmable divider means and display means and then to provide a different related one of said plurality of coded output signals to an enabled other one of said programmable divider means and display.

Digital control apparatus comprising:

• signal producing means for receiving control signals and producing different corresponding pluralities of digital coded output signals in response to said control signals;
• programmable divider means coupled to said signal producing means for receiving said pluralities of coded output signals and producing, when enabled, different predetermined divisions in response to and related to each different received plurality of coded output signals, wherein said programmable divider means, when disabled, produces the predetermined division corresponding to the coded output signals received by said programmable divider means when said programmable divider means was last enabled;
• display means coupled to said signal producing means for receiving said pluralities of coded output signals and producing, when enabled, different corresponding predetermined displays in response to and related to each different received plurality of coded output signals, wherein said display means comprises controllable latch means for receiving signals when enabled and storing those received signals when disabled while providing those stored signals as drive signals to display modules;
• and
• control means coupled to said signal producing means, said programmable divider means, and said display means for alternately enabling each of said programmable divider and display means while the other means is disabled while also correspondingly alternately changing one of said pluralities of coded output signals from said signal producing means, wherein said control means utilizes the signal producing means to alternately produce different pluralities of output control signals to sequentially control both said programmable divider means and said display means to produce a display related to the division implemented by said programmable divider means, said control means utilizing said signal producing means to provide one of said pluralities of coded output signals to an enabled one of said programmable divider means and display means and then to provide a different but related one of said pluralities of coded output signals to an enabled other one of said and display means.

A frequency synthesizer and control apparatus comprising:

• signal producing means for receiving control signals and producing different corresponding pluralities of digital coded output signals in response to said control signals;
• programmable divider means, included in a phase locked loop means and coupled to said signal producing means, for receiving pluralities of coded output signals and producing, when enabled, different predetermined frequency divisions in response to each different received plurality of coded output signals, wherein said programmable divider means, when disabled, produces the predetermined division corresponding to the coded output signals received by said programmable divider means when said programmable divider means was last enabled;
• said phase locked loop means producing an output signal having a frequency determined by the frequency division of said programmable divider means;
• display means coupled to said signal producing means for receiving said pluralities of coded output signals and producing, when enabled, different corresponding predetermined displays in response to and related to each different received plurality of coded output signals, wherein said display means comprises controllable latch means for receiving signals when enabled and storing those received signals when disabled and wherein said display means comprises at least one visual display module driven by said stored signals of said controllable latch means;
• manual tuning means coupled to said signal producing means for adjustably producing some of said control signals supplied to said signal producing means;
• and
• control means coupled to said signal producing means, said manual tuning means, said display means and said programmable divider means for alternately enabling each of said programmable divider means and said display means while the other means is disabled while also correspondingly alternately changing one of said pluralities of coded output signals supplied by said signal producing means, wherein said control means utilizes the signal producing means to alternately produce different pluralities of output control signals to sequentially control both said divider means and said display means to produce a display related to the frequency division implemented by said programmable divider means, said control means utilizing said signal producing means to provide one of said pluralities of coded output signals to an enabled one of said divider programmable divider means and display means and then to provide a different but related one of said pluralities of coded output signals to an enabled other one of said programmable divider means and display means.