Compact frequency doubler/multiplier circuitry

Details Compact frequency doubler/multiplier circuitry Compact frequency doubler/multiplier circuitry

2005-11-22

2005-11-22

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

C327S116000

Reexamination Certificate

active

06967508

ABSTRACT:
The frequency doubling circuit and method provides an output signal with stable frequency and a 50% duty cycle. The frequency of the output signal is two times a frequency of the input signal. The circuit only requires four comparators, eight small capacitors, and some switches and transistors for frequency doubling applications. With the help of feedforward structure, the circuit has an almost-instantaneous response. The performance of the provided frequency doubling circuit and method is independent of the frequency and duty cycle of input signal, power supply voltage, temperature, and process variations.

REFERENCES:
patent: 6154076 (2000-11-01), Hastings
patent: 6348821 (2002-02-01), Schwartz
patent: 6369622 (2002-04-01), Lim et al.
patent: 6747489 (2004-06-01), Nasu

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