1. A reactor system suitable for the polymerization of an olefin monomer comprising first and second loop reactors effective for the polymerization of an olefin monomer;
a) each of said reactors having at least one settling leg connected to said reactor for receiving polymer slurry from said reactor and sequentially discharging settled polymer from said at least one settling leg to withdraw said polymer slurry from said reactor;
b) a transfer line extending from the outlet at least one first reactor settling leg to an inlet for said second loop reactor;
c) a flash line extending from said transfer line at a valve location intermediate said first reactor settling leg and said inlet for said second reactor; and
d) a multiway valve located in said transfer line at said valve location intermediate said first reactor settling leg and the inlet to said second reactor and having one position in which said multiway valve provides for the flow of polymer slurry through said transfer line to said second reactor and another position in which said first reactor settling leg is connected to said flash line for the discharge of polymer slurry from said first reactor settling leg to said flash line and removal of said polymer from said polymer system.
2. The system of claim 1 further comprising a supply line connected to said transfer line adjacent said valve location in order to supply diluent liquid to said transfer line.
3. The system of claim 2 wherein said supply line is located intermediate said valve location and the inlet to said second reactor.
4. The system of claim 1 further comprising a flash tank for said first reactor and wherein the flash line extending from said transfer line is connected to said flash tank.
5. The system of claim 4 wherein the ratio of the length of said flash line divided by the length of said transfer line is within the range of 6 to 14.
6. The system of claim 5 wherein said ratio is within the range of 8 to 12.
7. The system of claim 4 further comprising a second flash tank for said second reactor and a second flash line extending from a settling leg of said second reactor to said second reactor flash tank.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A digital system comprising at least:
a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and configured to control the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock.
2. A digital system as claimed in claim 1, wherein:
said at least one functional block is configured to detect the system clock signal.
3. A digital system as claimed in claim 1, wherein:
said at least one functional block comprises a clock detection circuitry, which is configured to detect the system clock signal.
4. A digital system as claimed in claim 1, wherein:
said at least one functional block is configured to receive the system clock signal directly from the control block.
5. A digital system as claimed in claim 1, wherein:
said at least one functional block is configured to ignore the system clock signal in response to the fact that the functional block has not requested for the system clock.
6. A digital system as claimed in claim 1, wherein:
two or more functional blocks are configured to request for the system clock at the same time.
7. A digital system as claimed in claim 1, wherein:
the control block comprises a slicer, which is configured to transform the system clock in digital form.
8. A digital system as claimed in claim 1, wherein:
the control block comprises a timer, which is configured to allow the system clock to settle.
9. A digital system as claimed in claim 1, wherein:
at least one functional block comprises a timer, which is configured to allow the system clock to settle.
10. A digital system as claimed in claim 1, wherein the digital system further comprises:
a filter for removing glitches from the system clock request signal.
11. A method in a digital system said system comprising at least:
a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and the method comprising:
controlling the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock.
12. A method as claimed in claim 11, further comprising:
detecting the system clock signal in said at least one functional block.
13. A method as claimed in claim 11, further comprising:
detecting the system clock signal by a clock detection circuitry.
14. A method as claimed in claim 11, further comprising:
receiving the system clock signal directly from the control block.
15. A method as claimed in claim 11, further comprising:
ignoring the system clock signal in response to the fact that the functional block has not requested for the system clock.
16. A method as claimed in claim 11, further comprising:
transforming the system clock in digital form by means of a slicer comprised by the control block.
17. A method as claimed in claim 11, further comprising:
allowing the system clock to settle by a timer.
18. A method as claimed in claim 11, further comprising:
removing glitches from the system clock request signal.
19. A mobile device comprising a digital system having at least:
a main processor unit;
a system oscillator for providing a system clock;
one or more functional blocks, whereof at least one is configured to detect a need for a system clock; and
a power management control block separate from the main processor unit and configured to control the system oscillator in order to provide the system clock in response to receiving a system clock request from at least one said functional blocks, said functional block being capable of waking up by itself and configured to send at least one system clock request signal to the control block to request the system clock.
20. A mobile device as claimed in claim 19, wherein the mobile device further comprises:
means for detecting the system clock signal in said at least one functional block.
21. A mobile device as claimed in claim 19, wherein the mobile device further comprises:
means for receiving the system clock signal directly from the control block;
22. A mobile device as claimed in claim 19, wherein the mobile device further comprises:
means for ignoring the system clock signal in response to the fact that the functional block has not requested for the system clock.
23. A mobile device as claimed in claim 19, wherein the mobile device further comprises:
means for transforming the system clock in digital form.
24. A mobile device as claimed in claim 19, wherein the mobile device further comprises:
means for allowing the system clock to settle.
25. A mobile device as claimed in claim 19, wherein the mobile device further comprises:
means for removing glitches from the system clock request signal.
26. A mobile device as claimed in claim 19, wherein the mobile device is one of the following or a combination thereof:
a mobile communication device
a mobile data processing device.