Signal generator with output frequency greater than the oscillator frequency

A system comprising:

• circuitry configured to generate a first periodic electronic signal at a first frequency;
• circuitry configured to generate a second periodic electronic signal at said first frequency, said second periodic electronic signal characterized as having a one half cycle phase relationship with said first periodic electronic signal;
• circuitry configured to generate a third periodic electronic signal having said first frequency and characterized as having a one quarter cycle phase relationship with said first periodic electronic signal;
• circuitry configured to generate a fourth periodic electronic signal having said first frequency and characterized as having a one half cycle phase relationship with said third periodic electronic signal;
• circuitry configured to average said first and said second periodic electronic signals to produce a first averaged periodic electronic signal characterized as having an improved duty cycle over a duty cycle of said first and said second periodic electronic signals;
• circuitry configured to average said third and said fourth periodic electronic signals to produce a second averaged periodic electronic signal characterized as having an improved duty cycle over a duty cycle of said third and said fourth periodic electronic signals;
• and
• circuitry configured to combine said first and second averaged periodic electronic signals in an exclusive OR circuit to produce an output periodic electronic signal at twice said first frequency.