Patent EP0194078A2 successfully refreshed from Google Patents.
EP0194078A2
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Electrosurgical generator with improved circuitry for generating RF drive pulse trains
Assignee: Valleylab Inc
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Filing: 1986-02-20
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Granted: —
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Expires: 2006-02-20
Abstract
Abstract An electrosurgical generator 10 comprises a patient circuit which includes an active electrode 12 and a return electrode 14. Means 16 of generator 10 generates a pulse train and includes an MXN storage device U 1 having M memory locations where M > 1 and each location having N storage positions where N ≥ 1. The storage device stores at least one K-bit binary signal which is sequentially put out from the storage device. An electrosurgical signal generating means which in response to the K-bit binary signal generates an electrosurgical signal which is applied to the patient circuit.
Inventors
- 👤 Michael Steve Klicek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 21:49
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; A61B2018/00636; A61B2018/0066; A61B2018/00684
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
An electrosurgical generator 10 comprising a-patient circuit including an active electrode 12 and a return electrode 14; and means 16 for generating a pulse train in said generator, characterized in that said pulse train generating means includes at least one MXN storage device Ul having M memory locations where M > 1 and where each location contains N storage positions where N ) 1, said storage device storing at least one, K-bit binary signal, where 1 < K ≤ M bits of which are respectively stored in the Jth storage positions of K of the M memory locations where J ≤ N; means for sequentially outputting said K-bit binary signal from said storage device; and electrosurgical signal generating means responsive to the K-bit binary signal for generating an electrosurgical signal and applying this signal to the patient circuit.
Claim 2
Dependent Claim
138 words
An electrosurgical generator 10 comprising a-patient circuit including an active electrode 12 and a return electrode 14; and means 16 for generating a pulse train in said generator, characterized in that said pulse train generating means includes at least one MXN storage device Ul having M memory locations where M > 1 and where each location contains N storage positions where N ) 1, said storage device storing at least one, K-bit binary signal, where 1 < K ≤ M bits of which are respectively stored in the Jth storage positions of K of the M memory locations where J ≤ N; means for sequentially outputting said K-bit binary signal from said storage device; and electrosurgical signal generating means responsive to the K-bit binary signal for generating an electrosurgical signal and applying this signal to the patient circuit.
Claim 3
Dependent Claim
19 words
A generator according to claim 1 characterized in that the storage device is a shift register (N = 1).
Claim 4
Dependent Claim
23 words
A generator according to claim 2 characterized in that the register is a fixed length register or a variable length register (U2, U3).
Claim 5
Dependent Claim
16 words
A generator according to claim 1, characterized in that the storage device is a read-only memory.
Claim 6
Dependent Claim
47 words
A generator according to any one of claims 1 to 4 characterized by including at least two of the storage devices where each stores a said K-bit binary signal, the electrosurgical generating means being responsive to both of said K-bit binary signals to generate the electrosurgical signal.
Claim 7
Dependent Claim
49 words
A generator according to any one of claims 1 to 4, characterized in that the storage device stores a plurality of binary signals, at least one of which is said K bits in length and-the other of which is H bits in length where 1 < H ≤ M.
Claim 8
Dependent Claim
122 words
A generator according to anyone of claims 1 to 6, characterized in that N > 1 and the storage device stores Q of the K-bit binary signals where 1 4 < Q ≤ N, the K-bit binary signals being respectively stored in the Jth storage positions of the K memory locations where J - 1, 2, ..., Q, each of said K-bit binary signals respectively has a unique configuration of ON and OFF states corresponding to a particular mode of operation of the generator, and the generator includes means for selecting, as an output from said storage device, one of the K-bit binary signals, the electrosurgical signal generating means being responsive to the selected K-bit binary signals to generate the electrosurgical signal.
Claim 9
Dependent Claim
88 words
The generator according to claim 7, characterized in that at least one of the K-bit binary signals contains a plurality of periods of a basic sequence of the ON and OFF states representative of the generator mode of operation corresponding to the one K-bit binary signals and where the means for sequentially ouputting the K-bit binary signal includes a counter for sequentially accessing the memory locations and decoding means response to the counter output for resetting the counter to its initial count each time it counts to K.
Claim 10
Dependent Claim
98 words
A generator according to claim 7, characterized in that the storage device is divided into P banks where the number of memory locations in each bank is M/P and where K ≤ M/P, at least one of said K-bit binary signals being stored in the Jth storage positions of K of the M/P memory locations of one of the banks where J ≤ N and at least another one of the K-bit binary signals being stored in the Rth storage positions of K of the M/P memory locations of another one of the banks where R ≤ N.
Claim 11
Dependent Claim
148 words
A generator according to anyone of claims 1 to 9 characterized in that the storage device stores Q pairs of the K-bit binary signals where 1 ≤ Q ≤ N/2, the first one of each pair of K-bit binary signals being respectively stored in the Sth storage positions of the K memory locations where S = 1, 2, ... Q/2 and the second one of each pair being respectively stored in the Tth storage positions of the K memory locations where T = Q/2 + 1, Q/2 + 2, ... , Q, and each of the pairs corresponds to a particular mode of operation of the generator and the generator includes means for selecting, as an output from said storage device, one of the pairs of K-bit binary signals, the electrosurgical signals generating means being response to the selected pair of K-bit signals to generate the electrosurgical signal.
References Cited (Backward Citations)
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