Multichannel cochlear implant with neural response telemetry
First Claim
1. A data transmission system comprising:
- a. a coding unit coupled to a communication channel, that transmits encoded digital information having defined minimum and maximum durations of logical states “
low” and
“
high”
;
b. a decoding unit coupled to the communication channel, that decodes information received, the decoder comprising;
i. a free running local oscillator LO coupled to an array of sampling capacitors, that effectively samples the information using the LO frequency, and ii. a circuit coupled to the sampling capacitors, that decodes the information and corrects any mismatch between nominal and actual LO frequency.
1 Assignment
0 Petitions
Accused Products
Abstract
A circuit and method for cochlear implant telemetry where digital data is encoded into an RF signal. The RF signal is applied via a rectifier diode to a first switch matrix S1 and a second switch matrix S2, with S1 being coupled to a first sampling capacitor C1 and S2 being coupled to a second sampling capacitor C2. A local oscillator signal with period T is applied that controls S1 and S2, cyclically coupling C1 and C2 to the RF signal, a first input to a comparator, and ground. The comparator compares the first input to a DC reference voltage. The output of the comparator is then sampled via a flip flop clocked by the local oscillator, with the flip flop outputting a data bit stream representative of the envelope of the RF signal having encoded information.
46 Citations
30 Claims
-
1. A data transmission system comprising:
-
a. a coding unit coupled to a communication channel, that transmits encoded digital information having defined minimum and maximum durations of logical states “
low” and
“
high”
;
b. a decoding unit coupled to the communication channel, that decodes information received, the decoder comprising;
i. a free running local oscillator LO coupled to an array of sampling capacitors, that effectively samples the information using the LO frequency, and ii. a circuit coupled to the sampling capacitors, that decodes the information and corrects any mismatch between nominal and actual LO frequency. - View Dependent Claims (2, 3, 4)
-
-
5. A data decoder system comprising:
a. a decoding unit coupled to a communication channel that decodes information received, the decoder comprising;
i. a free running local oscillator LO coupled to an array of sampling capacitors, that effectively samples the information using the LO frequency; and
ii. a circuit coupled to the sampling capacitors, that decodes the information and corrects any mismatch between nominal and actual LO frequency. - View Dependent Claims (6, 7, 8)
-
9. A circuit for detecting the envelope of an input signal, the circuit comprising:
-
a. a first sampling capacitor C1 and a second sampling capacitor C2, both capacitors coupled to ground;
b. a first switching matrix S1 cyclically coupling C1 to;
i. an input signal via a rectifier diode, the input signal being encoded with digital data, ii. a first input of a comparator, and iii. ground;
c. a second switch matrix S2 cyclically coupling C2 to;
i. the input signal via the rectifier diode, ii. the first input of the comparator, and iii. ground;
d. a local oscillator coupled to S1 and S2, that controls switch matrices S1 and S2, the local oscillator having period T;
e. a dc-reference coupled to a second input of the comparator; and
f. a flip flop coupled to the comparator output, the flip flop being clocked by the local oscillator producing a data bit stream output indicative of the input signal'"'"'s envelope. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A method for data telemetry, the method comprising:
-
a. encoding digital data into an input signal;
b. applying the input signal via a rectifier diode to a first switch matrix S1 and a second switch matrix S2, S1 being coupled to a first sampling capacitor C1, S2 being coupled to a second sampling capacitor C2;
c. applying a local oscillator signal with period T that controls S1 and S2, so as to cyclically couple C1 and C2 to;
i. the input signal, ii. a first input to a comparator, and iii. ground;
d. applying a DC reference voltage to the second input of the comparator; and
e. sampling the output of the comparator via a flip flop clocked by the local oscillator, the flip flop outputting a data bit stream, the data bit stream representative of the input signal'"'"'s envelope having encoded information. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification