Frequency divider with darlington transistors
AssigneeAvantek, Inc.
InventorIssy Kipnis
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Abstract
A frequency divider is disclosed that includes two bipolar transistors coupled as a Darlington pair, where the base of the first transistor receives an input signal to be divided, and where the common collectors of the transistors generate an output signal having a frequency equal to one-half or other integer submultiple of the input signal. The frequency divider also includes a feedback network operable for coupling a portion of the output signal from the output side of the transistors to the input side of the transistors. Such a frequency divider can provide signal conversion gain at microwave frequencies.
Claims7
A regenerative frequency divider comprising:
- an input port operable for receiving an input signal;
- an output port operable for supplying an output signal having a frequency substantially equal to an integer sub-multiple of the frequency of the input signal;
- first and second silicon bipolar transistors coupled as a Darlington pair, wherein the base of said first transistor is coupled to said input port, and wherein the common collectors of said transistors are coupled to said output port;
- and
- feedback means for coupling a portion of the output signal from said common collectors to the base of said first transistor.
A regenerative frequency divider comprising:
- an input port operable for receiving an input signal;
- an output port operable for supplying an output signal having a frequency substantially equal to an integer sub-multiple of the frequency of the input signal;
- first and second silicon NPN transistors coupled as a Darlington pair, wherein the base of said first transistor is coupled to said input port, and wherein the common collectors of said transistors are coupled to said output port;
- means for biasing said transistors, wherein said transistors and said biasing means are fabricated as a monolithic integrated circuit;
- and
- feedback means for coupling a portion of the output signal from said common collectors to the base of said first transistor, wherein said feedback means includes a capacitor and inductor connected in series between said common collectors and the base of said first transistor.
Dependencies are inferred from the claim text.