Back to results
US 2004/0201413 A1Published application
Circuit for loss-less diode equivalent
AssigneeSiemens Milltronics Process Instruments, Inc.
InventorClaude Mercier
Life of this patent
Estimating the term…
Abstract
A loss-less diode equivalent circuit which functions to reduce and eliminate the forward bias voltage or drop associated with conventional diodes. The loss-less diode comprises a reverse connected MOSFET device which is configured with a clamping circuit and coupled to an input stage. The drain is coupled to the input stage which receives an input signal. The source of the MOSFET device provides an output port for charging a capacitor in a conduction or on state.
Claims15
A loss-less diode circuit comprising:
- (a) an input stage having an input port and an output node, said input port being adapted for receiving an input signal;
- (b) a diode equivalent circuit having an input, said input being coupled to said output node, said diode equivalent circuit including a reverse connected field effect transistor having a first terminal forming said input coupled to said output node, a second terminal forming an output, and a third terminal providing a control input, and said field effect transistor having a diode providing a conduction path between said first and said second terminals when said field effect transistor is in an off state;
- (c) said diode equivalent circuit including a clamping device, said clamping device being coupled to the third terminal of said field effect transistor and providing a clamping voltage to protect said third terminal;
- and
- (d) the second terminal of said field effect transistor providing an output port for said circuit, and said output port being adapted for coupling to a capacitor and said capacitor being charged by the input signal applied to said input port.
2 more elements
A loss-less diode circuit comprising:
- (a) an input stage having an input port and an output node, said input port being adapted for receiving an input signal;
- (b) a diode equivalent circuit having an input, said input being coupled to said output node, said diode equivalent circuit including a reverse connected MOSFET device, said MOSFET device having a drain, a source and a gate, said drain being coupled to said output node, said gate being coupled to signal ground through a resistor, and said MOSFET device including an internal diode coupled between said drain and said source and providing a conduction path when said MOSFET device is in an off state;
- (c) said diode equivalent circuit including a Zener diode and a bipolar junction transistor, said Zener diode having a cathode and an anode, said cathode being coupled to the source of said MOSFET device, said anode being coupled to the anode of said Zener diode, and said bipolar junction transistor having an emitter, a collector and a base, said emitter being coupled to said cathode and the source of said MOSFET device, and said collector being coupled to said anode and the gate of said MOSFET device;
- and
- (d) the source of said MOSFET device providing an output port for said circuit, and said output port being adapted for coupling to a capacitor and said capacitor being charged by the input signal applied to said input port.
2 more elements
A loss-less diode circuit comprising:
- (a) an input stage having an input port and an output node, said input port being adapted for receiving an input signal;
- (b) a diode equivalent circuit having an input, said input being coupled to said output node, said diode equivalent circuit including a reverse connected MOSFET device, said MOSFET device having a drain, a source and a gate, said drain being coupled to said output node, said gate being coupled to signal ground through a resistor, and said MOSFET device including an internal diode coupled between said drain and said source;
- (c) said diode equivalent circuit including a bipolar junction transistor, said bipolar junction transistor having an emitter, a collector and a base, said collector being coupled to the source of said MOSFET device, and said emitter being coupled to the gate of said MOSFET device;
- and
- (d) the source of said MOSFET device providing an output port for said circuit, and said output port being adapted for coupling to a capacitor and said capacitor being charged by the input signal applied to said input port.
2 more elements
Dependencies are inferred from the claim text.