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US 4,931,921 AGranted
Wide bandwidth frequency doubler
AssigneeMotorola, Inc.
InventorDale R. Anderson
Life of this patent
Estimating the term…
Abstract
A single-transistor frequency doubler uses an elliptical filter on the collector of the transistor to improve the bandwidth of the doubler. Bandwidths in excess of thirty five percent having relatively constant output power levels at frequencies over 200 MHz can be realized.
Claims8
A frequency multiplier comprised of:
- signal amplification means, having an input and an output, for amplifying an input signal and producing an output signal having harmonic frequency multiples of said input signal;
- first elliptical filter means having a relatively low input impedance at the frequency of said input to said signal amplification means and a relatively high input impedance at a pass-band frequency range, said first elliptical filter means coupled to said output of said signal amplification means for attenuating electrical signals outside of said pass-band frequency range while substantially passing signals within said pass-band frequency range, said first elliptical filter means passing signals at frequency multiples of said signal input to the amplification means.
Dependencies are inferred from the claim text.