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1. (WO2019005677) RÉGULATION DE TENSION SUR PUCE AVEC COMMUTATEURS DISTRIBUÉS
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

WHAT IS CLAIMED IS:

1. A distributed voltage regulator comprising:

a plurality of switches distributed in an area receiving a regulated voltage, each of the switches have one of N resistance values, N being an integer, the switches coupled to receive an unregulated voltage; and a plurality of switch control lines coupled to selectively enable selected ones of the plurality of switches according to values of respective ones of the switch control lines, each of the plurality of switches being coupled to receive one of the switch control lines, the selected ones of the switches to collectively convert the unregulated voltage to the regulated voltage.

2. The distributed voltage regulator as recited in claim 1 further comprising: a selector circuit coupled to receive a first group of control lines and a second group of control lines and to supply a selected one of the first group and the second group of control lines as the switch control lines.

3. The distributed voltage regulator as recited in claim 2 further comprising: a plurality of droop detector circuits distributed through the area receiving the regulated voltage, each of the droop detector circuits configured to detect when the regulated voltage is below a droop threshold voltage and supply a droop detection indication thereof; and

wherein the selector circuit selects the first group of control lines responsive to the droop detection indication being asserted and selects the second group of control lines responsive to the droop detection indication being unasserted, the droop detection indication being supplied by one of the droop detection circuits.

4. The distributed voltage regulator as recited in claim 2 further comprising: a controller to supply the first group of control lines and the second group of control lines to the selector circuit.

5. The distributed voltage regulator as recited in claim 2 wherein the selector circuit is coupled to receive the unregulated voltage.

6. The distributed voltage regulator as recited in any of claims 1 to 5 further comprising:

wherein the switches are distributed in a fine grain pattern in evenly spaced rows through the area being supplied the regulated voltage, the evenly spaced rows being approximately 20-30 microns apart.

7. The distributed voltage regulator as recited in any of claims 1 to 5 wherein: a first group of the plurality of switches having a first resistance value of the N resistance values are distributed in a first grid pattern through the area receiving the regulated voltage; and

wherein a second group of the plurality of switches having a second resistance value of the N resistance values are distributed in a second grid pattern through the area receiving the regulated voltage.

8. The distributed voltage regulator as recited in any of claims 1 to 5, wherein a first control line corresponding to a most significant bit of the

switch control lines is coupled to a first number of switches having a first resistance; and

wherein a second control line corresponding to another bit of the switch

control lines is coupled to a second number of switches having a second resistance, the second resistance being lower than the first resistance and the second number being greater than the first number.

9. The distributed voltage regulator as recited in any of claims 1 to 5 further comprising:

buffers to redrive the switch control lines, the buffers coupled to the

unregulated voltage.

10. The distributed voltage regulator as recited in any of claims 1 to 5 wherein:

the regulated voltage supplied by the switches is directly coupled to first logic being supplied the regulated voltage, the first logic being adjacent to the switches; and

wherein the regulated voltage supplied by the switches is coupled to an upper metal layer and supplied to second logic being powered by the regulated voltage through the upper metal layer.

11. A method for generating a regulated voltage comprising:

supplying a plurality of switches distributed in a grid pattern with an

unregulated voltage, the grid pattern being over an area supplied with the regulated voltage; and

supplying each of the plurality of switches with one of a plurality of switch control lines to configure the plurality of switches to generate a desired regulated voltage from the unregulated voltage.

12. The method as recited in claim 11 further comprising:

supplying a first group of control lines and a second group of control lines to a selector circuit; and

supplying a selected one of the first and second group of control lines as the switch control lines.

13. The method as recited in claim 12 further comprising:

detecting in a droop detector circuit when the regulated voltage is below a droop threshold voltage and supplying a droop detection signal indicative thereof; and

selecting one of the first group of control lines and the second group of control lines in the selector circuit as the switch control lines according to the droop detection signal.

14. The method as recited in claim 12 further comprising:

supplying the selector circuit with the unregulated voltage.

15. The method as recited in claim 12 further comprising:

supplying the selector circuit with the first group of control lines and the second group of control lines from a control circuit.

16. The method as recited in any of claims 11 to 15 further comprising:

configuring a first plurality of the switches having a first resistance value to be on according to the desired regulated voltage; and

configuring a second plurality of the switches having a second resistance value to be on according to the desired regulated voltage.

17. The method as recited in any of claims 11 to 15,

supplying a first switch control line of the switch control lines to a first

number of switches having a first resistance; and

supplying a second switch control line of the switch control lines to a second number of the switches having a second resistance, the second resistance being lower than the first resistance and the second number of switches being at least an order of magnitude greater than the first resistance.

18. The method as recited in any of claims 11 to 15 further comprising:

supplying the unregulated voltage to a plurality of buffers; and

redriving the switch control lines with the buffers.

19. The method as recited in any of claims 11 to 15 further comprising:

supplying the regulated voltage from the switches directly to first logic

adjacent to the switches in the area receiving the regulated voltage; and supplying the regulated voltage from the switches to a voltage rail in a metal layer; and

supplying the regulated voltage from the voltage rail through vias to second logic in the area receiving the regulated voltage.

20. The method as recited in any of claims 11 to 15 further comprising generating the regulated voltage from enabled ones of the plurality of switches collectively.

21. A distributed voltage regulator comprising:

a plurality of switches distributed in a grid pattern across an area receiving a regulated voltage, enabled ones of the plurality of switches coupled to receive an unregulated voltage and supply the regulated voltage;

wherein each of the plurality of switches has one of a plurality of different resistance values;

a plurality of droop detect circuits distributed through the area, the droop

detect circuits to detect when the regulated voltage is below a threshold droop value and supply respective droop detect signals; and a plurality of select circuits, each of the select circuits coupled to receive a first group of control lines and a second group of control lines and to select one of the first group of control lines and the second group of control lines as switch control lines according to the respective droop detect signals, the plurality of switches coupled to receive respective ones of the switch control lines.

22. A computer readable medium encoding a computer readable description of a distributed voltage regulator, the distributed voltage regulator including:

a plurality of switches distributed in evenly spaced rows in an area receiving a regulated voltage, each of the switches have one of N resistance values, N being an integer, the switches coupled to receive an unregulated voltage; and

a plurality of switch control lines coupled to selectively enable selected ones of the plurality of switches according to values of respective ones of the switch control lines, each of the plurality of switches being coupled to receive one of the switch control lines, the selected ones of the switches to collectively convert the unregulated voltage to the regulated voltage.