Frequency doubler
OwnerChris Grondahlinventor
Life of this patent
Estimating the term…
Abstract
The invention provides a frequency doubler which uses an input tuning circuit configured to provide a low-pass frequency response and an input circuit configured to provide a high pass frequency response, where each tuning circuit drives a nonlinear device. The two nonlinear devices are fed 180 degrees out of phase, such that the even harmonics produced by the two non-linear devices are in phase while the odd harmonics produced by the non-linear devices are out of phase. The signals from the non-linear devices are combined into a single node producing a signal with a frequency that is twice the input frequency of the input signal.
Claims23
A frequency doubler comprising:
- a) a first input tuning circuit, said first input tuning circuit configured to provide a low-pass frequency response;
- b) a first non-linear circuit device electrically connected to said first input tuning circuit;
- c) a second input tuning circuit, said second input tuning circuit configured to provide a high-pass frequency response;
- d) a second non-linear circuit device electrically connected to said second input tuning circuit;
- and
- e) an output tuning circuit electrically connected to said first non-linear circuit device and said second non-linear circuit device.
A frequency doubling circuit comprising:
- a) a first circuit configured to provide a first half-rectified frequency signal, said first circuit including a low-pass topology;
- b) a second circuit configured to provide a second half rectified frequency signal substantially 180 degrees out of phase with said first half-rectified frequency signal, said second circuit including a high-pass topology;
- and
- c) an output circuit electrically connected to said first circuit and said second circuit, said output circuit combining said first half-rectified frequency signal and said second half-rectified frequency signal.
A method of doubling a frequency comprising:
- receiving a frequency signal at a first input circuit configured to provide a low-pass frequency signal to a first non-linear device, said first non-linear device configured to provide a first non-linear device signal to an output circuit;
- receiving said frequency signal at a second input circuit configured to provide a high-pass frequency signal to a second non-linear device, said second non-linear device configured to provide a second non-linear signal to said output circuit, said high-pass frequency signal being substantially 180 degrees out of phase with said low pass frequency signal;
- providing said low-pass frequency signal to said first non-linear device, and providing said high pass frequency signal to said second non-linear device;
- providing said first non-linear device signal and said second non-linear device signal to said output circuit, said output circuit configured to combine said first transistor signal and said second transistor signal into a combined frequency signal;
- transforming the impedance of the first non-linear device and the second non-linear device to a predetermined impedance;
- and
- combining said first non-linear device signal and said second non-linear device signal into a single electrical node.
Dependencies are inferred from the claim text.