Full-wave rectifier and method of operation for a recognition system
First Claim
1. An improved full-wave rectifier for a transponder, said transponder being formed on a one substrate and associated with a matching member which operates to control a control mechanism of a device;
- the matching member and other non-matching members containing facilities each of which, when receiving energy transmitted from a transmitter/receiver an antenna produce a respective unique recognition signal in the transponder;
control of the device being possible only upon simultaneous occurrence of both operation of the control mechanism and production of a recognition signal by the matching member;
wherein the improved full-wave rectifier comprises;
a first transistor and a second transistor in combination forming a first transistor pair for minimizing voltage drop between ground and the transponder substrate;
a third transistor and a fourth transistor in combination forming a second transistor pair for minimizing the voltage drop between the alternating current peak voltage and the output voltage of said full-wave rectifier;
said first transistor pair and said second transistor pair being controlled by alternating current voltage input signals to produce a full-wave rectified alternating current voltage output; and
a regulator circuit for decoupling said first transistor pair and said second transistor pair from capacitive loads of said full-duplex transponder.
1 Assignment
0 Petitions
Accused Products
Abstract
A full-wave rectifier circuit (70) includes a first transistor (N1) and a second transistor (N2) in combination to form a first transistor pair (N1 and N2) for minimizing the voltage drop between ground (88) and the transponder substrates. A third transistor (P1) and a fourth transistor (P2) operate in combination to form a second transistor pair (P1 and P2) for minimizing the voltage drop between the alternating current peak voltage (118 and 120) and the output voltage (VDD) of the full-wave rectifier (70). The first transistor pair (N1 and N2) and second transistor pair (P1 and P2) are controlled by alternating current voltage input signals (118 and 120). A series regulator circuit (70) decouples the first transistor pair (N1 and N2) and the second transistor pair (P1 and P2) from capacitive loads (C1 and C2) of the full-duplex transponder circuitry (14).
-
Citations
8 Claims
-
1. An improved full-wave rectifier for a transponder, said transponder being formed on a one substrate and associated with a matching member which operates to control a control mechanism of a device;
- the matching member and other non-matching members containing facilities each of which, when receiving energy transmitted from a transmitter/receiver an antenna produce a respective unique recognition signal in the transponder;
control of the device being possible only upon simultaneous occurrence of both operation of the control mechanism and production of a recognition signal by the matching member;
wherein the improved full-wave rectifier comprises;a first transistor and a second transistor in combination forming a first transistor pair for minimizing voltage drop between ground and the transponder substrate; a third transistor and a fourth transistor in combination forming a second transistor pair for minimizing the voltage drop between the alternating current peak voltage and the output voltage of said full-wave rectifier; said first transistor pair and said second transistor pair being controlled by alternating current voltage input signals to produce a full-wave rectified alternating current voltage output; and a regulator circuit for decoupling said first transistor pair and said second transistor pair from capacitive loads of said full-duplex transponder. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- the matching member and other non-matching members containing facilities each of which, when receiving energy transmitted from a transmitter/receiver an antenna produce a respective unique recognition signal in the transponder;
-
8. An improved full-wave rectifier for a transponder associated with a matching key which is operable by insertion into to control a device;
- the matching key containing the facilities such that, when receiving energy radiated by a transmitter/receiver via an antenna, the key is in the vicinity of a lock of a device, the key produces a unique recognition signal to the transmitter/receiver;
control of the device being possible only upon simultaneous occurrence of both operation of the lock and production of a recognition signal by the key;
wherein the improvement comprises;a first transistor and a second transistor in combination forming a first transistor pair for minimizing voltage drop between ground and the transponder substrate; a third transistor and a fourth transistor in combination forming a second transistor pair for minimizing the voltage drop between the alternating current peak voltage and the output voltage of said full-wave rectifier; said first transistor pair and said second transistor pair being controlled by alternating current voltage input signals to produce a full-wave rectified current voltage output alternating; and
a regulator for circuit decoupling said first transistor pair and said second transistor pair from compacitive loads of said full-duplex transponder.
- the matching key containing the facilities such that, when receiving energy radiated by a transmitter/receiver via an antenna, the key is in the vicinity of a lock of a device, the key produces a unique recognition signal to the transmitter/receiver;
Specification