Personal digital assistant module having a broadcast pointer device
First Claim
1. A digital assistant module having a separate pointer device, comprising:
- an enclosure;
a CPU within the enclosure;
a memory coupled to the CPU;
a video display coupled to and operable by the CPU, implemented on a surface of the enclosure;
a pair of broadcast antenna within the enclosure adapted to broadcast a carrier waveform at a common frequency but at a known phase difference;
a rectifier circuit in the pointer device comprising two antenna connected through a diode;
a receiving antenna in the enclosure configured to receive an echo of the summed waveforms broadcast by the pair of broadcast antennas; and
circuitry within the enclosure connected to the receiving antenna and adapted for analyzing the received waveform and determining the position of the pointer from waveform characteristics.
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Accused Products
Abstract
A personal digital assistant module with a local CPU, (central processing unit) memory, and I/O (input/output) interface has a host interface comprising a bus connected to the local CPU and a connector at a surface of the personal digital assistant for interfacing to a bus connector of a host general-purpose computer, providing direct bus communication between the personal digital assistant and the host general-purpose computer. In an embodiment, the personal digital assistant also stores a security code. The personal digital assistant according to the invention forms a host/satellite combination with a host computer having a docking bay, wherein upon docking a docking protocol controls access by the host to memory of the personal digital assistant based on one or more passwords provided by a user to the host. In another embodiment the personal digital assistant also has an expansion port connected to the local CPU, and expansion peripheral devices may be connected and operated through the expansion port. Connectable devices may include input devices such as pointer devices, that may in some cases be stored in a compartment fashioned for the purpose in the personal digital assistant.
185 Citations
10 Claims
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1. A digital assistant module having a separate pointer device, comprising:
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an enclosure; a CPU within the enclosure; a memory coupled to the CPU; a video display coupled to and operable by the CPU, implemented on a surface of the enclosure; a pair of broadcast antenna within the enclosure adapted to broadcast a carrier waveform at a common frequency but at a known phase difference; a rectifier circuit in the pointer device comprising two antenna connected through a diode; a receiving antenna in the enclosure configured to receive an echo of the summed waveforms broadcast by the pair of broadcast antennas; and circuitry within the enclosure connected to the receiving antenna and adapted for analyzing the received waveform and determining the position of the pointer from waveform characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification