Transponder for an automatic vehicle identification system
US3964024A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1974 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Nov 15, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K11/006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This disclosure relates to an inductively powered type of electronic transponder for identifying a moving object passing an interrogation area. The transponder includes a tuned inductive-capacitive pick-up circuit for receiving interrogating signals. The picked up interrogating signals are rectified to produce d.c. operating power and are applied to a frequency divider for producing a frequency related transmission signal and clock data rate pulse. A latching circuit enables a shift register so that the clock pulses serially shift out binary encoded data from the shift register. The encoded data is fed to a logic network which is coupled to a balanced switching amplifier for phase modulating the transmission signal for propagation into the interrogation area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.