1. A method for architecting a delay locked loop clock signal circuit comprising:
providing at least one clock signal to a clock signal splitter;
alternately outputting said at least one clock signal from said clock signal splitter on at least two matched delay lines; and
alternately propagating said at least one pulse of said at least one clock signal down each of said at least two matched delay lines by said signal splitter,
specifying a delay period for each of said at least two matched delay lines with a control signal;
updating said at least two matched delay lines with said control signal when a fixed update window is always present on said at least two matched delay lines; and
distributing said control signal to synchronously update said at least two matched delay lines.
combining said pulses from the output of said two matched delay lines, wherein a delayed a delayed version of said at least one clock signal is recovered.
2. The method of claim 1, wherein said synchronous update occurs within said fixed update window.
3. The method of claim 1, wherein said fixed update window is equal to at least a mimic delay of a circuit reduced by a duty cycle tolerance of said at least one clock signal.
4. A method for architecting a delay locked loop clock signal circuit comprising:
providing at least one clock signal to a clock signal splitter;
alternately outputting said at least one clock signal from said clock signal splitter on at least two matched delay lines; and
alternately propagating said at least one clock signal down each of said at least two matched delay lines by said signal splitter,
specifying a delay period for each of said at least two matched delay lines with a control signal;
updating said at least two matched delay lines with said control signal when a fixed update window is always present on said at least two matched delay lines; and
distributing said control signal to synchronously update said at least two matched delay lines,
wherein no transitions are present in said fixed update window on said at least two matched delay lines.
5. The method of claim 4, wherein said synchronous update occurs within said fixed update window.
6. The method of claim 4, wherein said fixed update window is equal to at least a mimic delay of a circuit.
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 DPF system for an engine generator that carries out a recovery process on a filter (DPF) provided to remove particulate matter generated by combustion of fuel for an engine when an amount of the particulate matter attached to the DPF exceeds a predetermined value, the engine generator carrying out the recovery process by performing an automatic recovery operation to raise a temperature of exhaust gas from the engine to burn the particulate matter, the DPF system comprising:
a dummy load connected to the engine generator when necessary; and
control device for allowing the engine to perform an automatic recovery preparation operation in such a manner that once the amount of the particulate matter exceeds the predetermined value, the automatic recovery operation is performed when the temperature of exhaust gas reaches an automatic recovery reference temperature, and the dummy load is connected to the generator to raise the temperature of exhaust gas when the temperature of exhaust gas does not reach the automatic recovery reference temperature.
2. The DPF system for the engine generator according to claim 1, wherein the control device
measures a change in load after the automatic recovery preparation operation is started, and
cuts off the dummy load when the load increases rapidly.
3. The DPF system for the engine generator according to claim 1, wherein the control device
measures a change in load after the automatic recovery preparation operation is started, and
cuts off the dummy load when the load exceeds a predetermined value, once a predetermined time has elapsed.
4. The DPF system for the engine generator according to claim 3, wherein the control device
measures a change in load after the automatic recovery preparation operation is started, and
after the load exceeds a predetermined value and then decreases below the predetermined value again within a predetermined time, continues the automatic recovery preparation operation.
5. The DPF system for the engine generator according to claim 1, wherein, during the automatic recovery operation, the control device cuts off the dummy load when the load exceeds the predetermined value or increases rapidly while the dummy load is applied, and applies the dummy load when the dummy load is not applied and the load does not exceed the predetermined value, and suspends imposition of the dummy load when the load increases rapidly even if the dummy load is not applied and the load does not exceed the predetermined value.