Circuit for controlling a receiver in an implanted device
First Claim
1. Receiver apparatus for an implantable device of the remotely programmable type comprising:
- an analog receiver operative when activated for receiving programming signals, including wakeup signals, from a remote programming unit;
digital circuit means for causing the receiver to be intermittently activated to watch for a remotely generated wake-up signal, said wake-up signal being of sufficient duration and period to coincide with an activated period of the receiver, the power consumption of said receiver being relatively higher when activated then when deactivated; and
digital latching means for causing the receiver to be continuously activated for a predetermined time interval when a wake-up signal is detected by the receiver while intermittently activated so that a series of programming signals may be received.
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Abstract
A circuit for controlling a receiver in an implanted device and circuitry for decoding and storing received program signals is disclosed. In the circuit a control circuit periodically activates a receiver to surveil for remotely generating programming signals. When a program signal is detected by the receiver the control circuit latches the receiver into a continuously activated state for a predetermined time interval. If a reset code is detected from subsequently received signals the receiver is held in an activated condition for a further predetermined time interval. Decoding circuits including a timer are reset upon receipt of the refresh code and provide control over sequences of received programming data for use in programming the stimulation mode of output circuits in the implanted device.
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Citations
12 Claims
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1. Receiver apparatus for an implantable device of the remotely programmable type comprising:
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an analog receiver operative when activated for receiving programming signals, including wakeup signals, from a remote programming unit; digital circuit means for causing the receiver to be intermittently activated to watch for a remotely generated wake-up signal, said wake-up signal being of sufficient duration and period to coincide with an activated period of the receiver, the power consumption of said receiver being relatively higher when activated then when deactivated; and digital latching means for causing the receiver to be continuously activated for a predetermined time interval when a wake-up signal is detected by the receiver while intermittently activated so that a series of programming signals may be received. - View Dependent Claims (2, 3)
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4. Receiver apparatus for an implantable device of the remotely programmable type comprising:
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an analog receiver operative when activated for receiving programming signals from a remote programming unit; digital circuit means for recurringly activating the receiver at a low duty cycle so that the receiver intermittently surveys for remotely generated programming signals, the power consumption of said receiver being relatively higher when activated than when deactivated; digital latching means connected to the receiver and responsive to the first programming signal detected by the receiver for holding the receiver in an activated condition for a predetermined time interval; and digital reset means responsive to more than one programming signal comprising a reset code detected by the receiver while held in said activated condition for causing said latching means to hold the receiver in an activated condition for another predetermined time interval. - View Dependent Claims (5, 6, 7)
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8. A circuit for controlling the reception and decoding of remotely generated signals in an implantable device of the programmable type, comprising:
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an analog receiver operative when activated for receiving programming signals from a remote programming unit; digital circuit means for recurringly activating the receiver at a low duty cycle so that the receiver intermittently surveys for remotely generated programming signals, the power consumption of said receiver being relatively higher when activated than when deactivated; digital latching means connected to the receiver and responsive to the first programming signal detected by the receiver for holding the receiver in an activated condition for a first predetermined time interval; digital counting means for counting programming signals detected by the receiver; digital reset means connected to said counting means and responsive to more than one programming signal comprising a reset code detected by the receiver while held in said activated condition for causing said latching means to hold the receiver in an activated condition for another first predetermined time interval and for resetting said counting means; a programmable output circuit; digital circuit means for linking a sequence of programming signals to the output circuit when a predetermined signal count is accumulated by said counting means; and digital sequence timing means for causing said counting means to reset at the end of a second predetermined time interval beginning when said counting means is reset, said second time interval having a duration relative to the duration of a valid programming sequence so that programming sequences not completed within said second predetermined time interval are prevented from linking to the output circuit. - View Dependent Claims (9, 10, 11, 12)
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Specification