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US 2003/0151442 A1Published application
Integratable circuit configuration for potential-free signal transmission
AssigneeInfineon Technologies AG
InventorBernhard Strzalkowski
Life of this patent
Estimating the term…
Abstract
A circuit configuration for potential-free signal transmission has a transformer with a primary winding and a secondary winding. A drive circuit is connected upstream of the primary winding and a selection circuit is connected up to the secondary winding and is driven by pulses. A latching circuit is connected downstream of the selection circuit and prevents a forwarding of second pulses under specific conditions. Finally, a storage element generates an output signal.
Claims16
A circuit configuration for potential-free signal transmission, comprising:
- a transformer having two windings magnetically coupled to one another, said two windings including a primary winding and a secondary winding;
- a drive circuit connected upstream of said primary winding and converts edges of a logical input signal into primary-side pulses corresponding to the logical input signal, each of the primary-side pulses in said primary winding generating in said secondary winding secondary pulses corresponding to the edges of the logical input signal;
- a selection circuit connected up to said secondary winding, said selection circuit driven by the secondary pulses and separates the secondary pulses according to a respective assignment to an edge of the logical input signal;
- a latching circuit connected downstream of said selection circuit, said latching circuit comparing separate ones of the secondary pulses with one another and prevents a forwarding of the secondary pulses in an event of separate ones of the secondary pulses occurring simultaneously and/or in an event of the secondary pulses occurring in short-time succession;
- and
- a storage element connected to said latching circuit, said storage element being set by the secondary pulses of a first polarity, being reset by the secondary pulses of a second polarity, and generates an output signal.
3 more elements
An integrated configuration, comprising:
- a semiconductor body;
- and
- a circuit configuration for potential-free signal transmission completely integrated into said semiconductor body, said circuit configuration including:
- a transformer having two windings magnetically coupled to one another, said two windings including a primary winding and a secondary winding;
- a transformer having two windings magnetically coupled to one another, said two windings including a primary winding and a secondary winding;
- a drive circuit connected upstream of said primary winding and converts edges of a logical input signal into primary-side pulses corresponding to the logical input signal, each of the primary-side pulses in said primary winding generating in said secondary winding secondary pulses corresponding to the edges of the logical input signal;
- a selection circuit connected up to said secondary winding, said selection circuit driven by the secondary pulses and separates the secondary pulses according to a respective assignment to an edge of the logical input signal;
- a latching circuit connected downstream of said selection circuit, said latching circuit comparing separate ones of the secondary pulses with one another and prevents a forwarding of the secondary pulses in an event of separate ones of the secondary pulses occurring simultaneously and/or in an event of the secondary pulses occurring in short-time succession;
- and
- a storage element connected to said latching circuit, said storage element being set by the secondary pulses of a first polarity, being reset by the secondary pulses of a second polarity, and generates an output signal.
7 more elements
Dependencies are inferred from the claim text.