Medical device having precision interconnect
First Claim
1. A precision interconnect circuit, comprising:
- an input port for receiving a first or second pressure guide wire;
an interface coupled to the input port, the interface operational in a first and a second state; and
an interface controller that changes the interface from the first to the second state, and wherein the first state corresponds to receiving the first guide wire and the second state corresponds to receiving the second guide wire.
5 Assignments
0 Petitions
Accused Products
Abstract
An electrical device such as a pressure guide wire (700) which has a resistive pressure sensor, such as a piezoresistive sensor (208), uses a precision interconnect in order to provide proper pressure measurement readings. The precision interconnect helps avoid the effects of contact and line resistance on the measurement of the pressure sensor'"'"'s resistors (402 and 404). The precision interconnect uses high input impedance device'"'"'s such as differential operational amplifiers (902, 904) in order to overcome the effect of any changes in the contact resistance. Further, an interface switch (1110) which is responsive to a control signal (1106) automatically determines what type of pressure guide wire (10 or 700) is attached to the interface circuit (1200).
91 Citations
22 Claims
-
1. A precision interconnect circuit, comprising:
-
an input port for receiving a first or second pressure guide wire;
an interface coupled to the input port, the interface operational in a first and a second state; and
an interface controller that changes the interface from the first to the second state, and wherein the first state corresponds to receiving the first guide wire and the second state corresponds to receiving the second guide wire. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A precision interconnect circuit, comprising:
-
an input port for receiving a first or second pressure guide wire;
an interface switch coupled to the input port, the interface switch operational between a first and second state; and
a control circuit coupled to the interface switch for providing a control signal to the interface switch for switching the interface switch from the first to the second state, wherein the control signal has a different logic level depending on which of the first or second guide wires is coupled to the input port. - View Dependent Claims (8)
-
-
9. A precision interconnect circuit, comprising:
-
an input port for receiving a first or second pressure guide wire;
an interface switch coupled to the input port the interface switch operational between a first and second state; and
a control circuit coupled to the interface switch for providing a control signal to the interface switch for switching the interface switch from the first to the second state, wherein the control circuit comprises an oscillator and demodulator coupled to the input port. - View Dependent Claims (10, 11, 12)
-
-
13. A precision interconnect circuit, comprising:
-
an input port for receiving a first or second pressure guide wire, wherein the first and second pressure guide wires both include a pressure sensor comprising at least one resistive element and the input port includes a high input impedance device electrically coupled to the at least one resistive element and wherein the high input impedance device comprises a differential operational amplifier which measures the voltage drop across the at least one resistive element;
an interface switch coupled to the input port, the interface switch operational between a first and second state; and
a control circuit coupled to the interface switch for providing a control signal to the interface switch for switching the interface switch from the first to the second state.
-
-
14. A method for operating a precision interconnect circuit, comprising:
-
receiving a first guide wire or a second guide wire in an input port;
generating a control signal for an interface coupled to the input port; and
switching the interface to one of either a first state or a second state in response to the generated control signal, wherein the first state corresponds to receiving the first guide wire and the second state corresponds to receiving the second guide wire. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
-
Specification