Frequency doubler circuit with trimmable current control

Details Frequency doubler circuit with trimmable current control Frequency doubler circuit with trimmable current control

2007-02-20

2007-02-20

Mis, David (Department: 2817)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

Reexamination Certificate

active

09977111

ABSTRACT:
A frequency doubler circuit with trimmable current control. In one embodiment, the present invention provides a circuit comprising an oscillator with a current source and a frequency doubler circuit coupled to the current source. In one embodiment, the current source is for generating a reference current. In one embodiment, the frequency doubler circuit is operable to receive a first frequency signal for generating a second frequency signal and also receiving the reference current. The frequency doubler circuit, using the reference current, operates to compensate for process variation of capacitance of the frequency doubler circuit and uses the reference current to maintain a known duty cycle. In one embodiment, the circuit further comprises a control loop for generating an output current, wherein the output current, operating in conjunction with the reference current, operates to compensate for process variation of capacitance of the frequency doubler circuit and uses the reference current to maintain a known duty cycle. In one embodiment, the current source comprises a trimmable current control.

REFERENCES:
patent: 5202687 (1993-04-01), Distinti
patent: 5317202 (1994-05-01), Waizman
patent: 6121805 (2000-09-01), Thamsirianunt et al.
patent: 6144327 (2000-11-01), Distinti et al.
patent: 6211708 (2001-04-01), Klemmer
CYPR-CD00196; “A Novel Band-Gap Circuit for Providing an Accurate Reference Voltage Compensated for Process State, Process Variations and Temperature”; U.S. Appl. No. 09/964,991; filed Sep. 26, 2001; Kutz et al.
CYPR-CD00201; “A Crytal-Less Oscillator Circuit With Trimmable Analog Current Control for Increased Stability”; U.S. Appl. No. 09/957,084; filed Sep. 19, 2001; Mar et al.

Affiliated with

Also associated with

Rating

Frequency doubler circuit with trimmable current control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency doubler circuit with trimmable current control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency doubler circuit with trimmable current control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3850631