Patent ID: 6218657
Filing Date: 2001-04-17
Classification: G01J

Abstract:
An avalanche detector circuit, comprising:an avalanche photon detector device having a first terminal and a second terminal;a first transmission line having first and second ends, the first end of the first transmission line being coupled to the first terminal of the avalanche photon detector device and the second end of the first transmission line being terminated by a first reflective termination, the first reflective termination having a first reflection coefficient, and the first transmission line having a round-trip propagation delay along the first transmission line; anda second transmission line having first and second ends, the first end of the second transmission line being coupled to the second terminal of the avalanche photon detector device and the second end of the second transmission line being terminated by a second reflective termination, the second reflective termination having a second reflection coefficient that is opposite from the first reflection coefficient, the second transmission line having a round-trip propagation delay along the second transmission line, and the round-trip propagation delay along the second transmission line being substantially equal to the round-trip propagation delay along the first transmission line.