Low emission signal generator and distribution system

• US 20070133999A1
• Filed: 11/06/2006
• Published: 06/14/2007
• Est. Priority Date: 12/13/2005
• Status: Active Grant

• Current Assignee: AWQ Consulting Incorporated
• Original Assignee: AWQ Consulting Incorporated
• Inventors: Bayramoglu, Gokalp
• Granted Patent: US 7,720,170 B2
• Time in Patent Office: Days
• US Class Current: 398/155
• CPC Class Codes: H04B 15/04 the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
• CPC Class Codes: H04B 2215/064 Reduction of clock or synthesizer reference frequency harmonics
• CPC Class Codes: H04B 2215/067 by modulation dispersion
• CPC Class Codes: H04L 7/0008 Synchronisation information channels, e.g. clock distribution lines

Abstract

A low emission signal manipulating circuit for reducing emission of a given signal. This is accomplished by manupulating the signal and recovering the original signal. The inventive device includes a transmitter which modifies a given signal, a divider that resides in transmitter which divides the incoming signal, a pulse shaping circuit which generates two pulses one at the leading edge and one at the trailing edge of the incoming signal, a receiver which recovers the original signal from the modified signal, a register which generates a signal based on incoming pulses, a phase locked loop circuit that generates a signal at the output. Transmitter has a divider circuit that divides the incoming signal. It also has pulse circuits where two pulses are generated. Divider has five flip flops that divides the incoming signal'"'"'s frequency by a predetermined amount. Pulse shaping circuit has two integrators and logic gates. Receiver has a register circuit and phase locked loop. Register has a flip flop. Phase Locked Loop has a phase comparator, charge pump, voltage controlled oscillator and a divider.

Claims

1. A system for reducing electromagnetic radiation from a circuit board or a system comprising:

a transmitter circuit for accepting a signal and converting it to a signal that has lower electromagnetic emission than the original signal and one or more receivers for recovering the original signal from the transmitted signal.

2. A system in accordance with claim 1, wherein said transmitter comprises a divider and a pulse shaping circuit.

3. A system in accordance with claim 1, wherein said transmitter can be a stand alone integrated circuit.

4. A system in accordance with claim 1, wherein said transmitter can be part of a larger integrated circuit.

5. A transmitter in accordance with claim 2, wherein said divider can be either fixed or programmable.

6. A divider in accordance with claim 5, wherein the said divider can be programmable and the division number can be supplied to it to control the division factor.

7. A divider in accordance with claim 5, wherein the said divider is implemented in software.

8. A divider in accordance with claim 5, wherein the said divider is implemented in hardware using different hardware components.

9. A transmitter in accordance with claim 2, wherein said means for changing the shape of the signal comprises an integrator.

10. A system in accordance with claim 7, wherein said integrator can be designed using analog components or digital signal processing.

11. A system in accordance with claim 7, wherein said integrator is programmable to adjust the pulse width of the modified signal.

12. A system in accordance with claim 1, wherein said transmitter can work with different voltages such as 5 volts, 3.3 volts, 2.5 volts and 1.8 volts.

13. A system in accordance with claim 1, wherein said transmitter is implemented in software.

14. A system comprising:

a transmitter for converting a given signal to another signal that has lower electromagnetic emission than the original signal by means of dividing the incoming signal and therefore reducing the signal frequency and a pulse shaping circuit that generates narrow pulses at rising and falling edges of the divided signal;

a receiver for recovering the original signal from the received signal by means of using phase locked loop circuit.

15. A system in accordance with claim 15, wherein the pulse shaping circuit is a hardware circuit.

16. A system in accordance with claim 15, wherein the pulse shaping circuit is implemented in software.

17. A system in accordance with claim 15, wherein the receiver comprising a preamplifier and a phase locked loop circuit.

18. A system in accordance with claim 16, wherein the phase locked loop circuit is programmable.

19. A system in accordance with claim 15, wherein the receiver is a stand alone integrated circuit.

20. A system in accordance with claim 15, wherein the receiver is implemented within another application specific integrated circuit.

21. A system in accordance with claim 15, wherein the pulse shaping circuit generates narrow pulses.

22. A system in accordance with claim 15, wherein the pulse width is programmable.