Claims
- 1. A signal generating device for a charge pump for an integrated circuit, the signal generating device having N signal outputs D1, . . . , DN and a signal setting input for setting a frequency f such that:a periodic signal Sx(t) can be output via the signal output Dx; all the signals S1(t), . . . , SN(t) have the same settable frequency f; and for x within an interval 2≦x≦N, Sx(t)=S1(t−(x−1)·ΔTx−kx/(2f)) wherein ΔTx is a frequency-dependent delay duration of the signal Sx(t) with respect to SX−1(t), and kX ε{0; 1}.
- 2. The signal generating device according to claim 1, wherein kX=(1+(−1)X)/2.
- 3. The signal generating device according to claim 1, wherein the delay duration ΔTX is equal to ΔT for all the signals S2(t), . . . , SN(t).
- 4. The signal generating device according to claim 1, further comprising a multiplicity of oscillator stages connected in a ring, the oscillator stages each having an oscillator stage input and an oscillator stage output;each oscillator stage output being respectively signal-connected to an oscillator stage input of a downstream oscillator stage; and the signal outputs D1, . . . , DN being signal-connected to a respective oscillator stage output of the oscillator stages.
- 5. The signal generating device according to claim 4, wherein the oscillator stages each comprise a settable delay element for setting a delay element duration τVG.
- 6. The signal generating device according to claim 5, wherein the settable delay element is of capacitive design.
- 7. The signal generating device according to claim 5, wherein the delay element is set by a setting signal that is input via the signal setting input.
- 8. The signal generating device according to claim 4, wherein the oscillator stages each comprise an inverting element.
- 9. The signal generating device according to claim 4, wherein the number of oscillator stages is equal to the number of signal outputs.
- 10. The signal generating device according to claim 3, wherein the delay duration ΔT is given by ΔT=1/(2·N·f).
- 11. The signal generating device according to claim 10, wherein the signal S1(t) is given by S1(t)=SN(t−Δt−k1/(2f), where k1 ε{O; 1).
- 12. An integrated circuit comprising a signal generating device according to claim 1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
102 19 371 |
Apr 2002 |
DE |
|
RELATED APPLICATIONS
This application claims the benefit of the April 30, 2002 filing date of German application DE 102.19.371.1, the contents of which are herein incorporated by reference.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5689213 |
Sher |
Nov 1997 |
A |
5999009 |
Mitsui |
Dec 1999 |
A |