STUART J RUBIN
Vehicle Board in Philadelphia, PA
License number
Pennsylvania MV024673L
Category
Vehicle Board
Type
Vehicle Salesperson
Address
Address
Philadelphia, PA 19116
Professional information
Resonant Circuit Detection Measurement And Deactivation System Employing A Numerically Controlled Oscillator
US Patent:
6359562, Mar 19, 2002
Filed:
Mar 16, 2001
Appl. No.:
09/810591
Inventors:
Stuart Rubin - Philadelphia PA
Assignee:
Checkpoint Systems, Inc. - Thorofare NJ
International Classification:
G08B 1314
US Classification:
3405723, 3405721, 3405725
Abstract:
An apparatus for deactivating a resonant circuit without physically contacting the resonant circuit. The EAS system includes a numerically controlled oscillator for generating an alternating electric signal, the frequency of the alternating electric signal varying in accordance with a numerical frequency control signal; a clock having a substantially fixed frequency connected to the numerically controlled oscillator; and a transmitting antenna connected to the numerically controlled oscillator for establishing an electromagnetic field within a deactivation zone. The frequency of the alternating electric signal is restricted to being an integer multiple of an integer sub-multiple of the clock frequency.
Resonant Circuit Detection, Measurement And Deactivation System Employing A Numerically Controlled Oscillator
US Patent:
6232878, May 15, 2001
Filed:
May 20, 1999
Appl. No.:
9/315452
Inventors:
Stuart Rubin - Philadelphia PA
Assignee:
Checkpoint Systems, Inc. - Thorofare NJ
International Classification:
G08B 1314
US Classification:
3405721
Abstract:
An apparatus for measuring electrical characteristics of a resonant circuit without physically contacting the resonant circuit. The EAS system includes a numerically controlled oscillator for generating an alternating electric signal, the frequency of the alternating electric signal varying in accordance with a numerical frequency control signal; a transmitting antenna connected to the numerically controlled oscillator for establishing an electromagnetic field within a measurement zone; a receiving antenna for sensing disturbances to the electromagnetic field within the measurement zone; a receiver for receiving signals from the receiving antenna representative of disturbances to the electromagnetic field and for determining the Q and center frequency of the resonant circuit; and a clock having a substantially fixed frequency connected to the numerically controlled oscillator. The frequency of the alternating electric signal is restricted to being an integer multiple of an integer sub-multiple of the clock frequency.