Integrated device for switching systems with filtered reference quantities

An integrated device comprising:

• a switching control generating circuit for generating a switching control generation signal;
• a reference signal generating circuit for generating a reference signal;
• a using circuit that accepts the reference signal;
• a storage circuit coupled to the reference signal generating circuit;
• a switch coupled to the switching control generating circuit and structured so that in a first state the switch couples the reference signal to the using circuit and to the storage circuit to allow the storage circuit to store a reference quantity of the reference signal, and that in a second state disconnects the reference signal from the using circuit and thereby allows the reference quantity to by applied to the using circuit from the storage circuit;
• and
• a filtering circuit coupled to the switch and structured to maintain the switch in one of the states responsive to the switching control generation signal.

A method to prevent interference in an output signal during a switching event comprising:

• coupling a reference voltage to a signal generating circuit and to a storage circuit during a period of a switch cycle;
• storing in the storage circuit a reference quantity reflective of the reference voltage;
• generating a switching signal;
• sensing the switching signal at a filter circuit;
• and
• decoupling the reference voltage from the signal generating circuit and thereby applying the reference quantity from the storage circuit to the signal generating circuit during a time period determined by the filter circuit and responsive to the switching signal.