Patent US4672245A successfully refreshed from Google Patents.
US4672245A
Expired / Lapsed
US
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High frequency diverse semiconductor switch
Assignee: Mitsubishi Electric Corp
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Filing: 1985-08-09
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Granted: 1987-06-09
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Expires: 2005-08-09
Abstract
Abstract Provided is a power semiconductor device operable to be switched at high frequencies. The semiconductor device according to the present invention is applied to a three-terminal BIMOS power semiconductor device in which a MOS-FET (2) is connected in parallel with a bipolar transistor (3) while the gate of the MOS-FET (2) is connected with the base of the bipolar transistor (3) through a reference-voltage diode (6) and a fast switching diode (7) so that the operation of the semiconductor device can be controlled by one driving circuit (1).
Inventors
- 👤 Gourab Majumdar
- 👤 Satoshi Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:05
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/567; H03K17/04; H03K17/042; H03K17/0422
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
A semiconductor device operable to be switched at high frequency, comprising, a field-effect transistor (2) having first and second electrodes and a control electrode, a bipolar transistor (3) having third, fourth and fifth electrodes, the fourth electrode being connected to said first electrode, and the fifth electrode being connected to said second electrode, at least a reference-voltage diode being connected in a reverse direction and at least a first diode being connected in a forward direction in view of said control electrode in a series manner in said order between said control electrode and said third electrode, a second diode being connected in parallel with a series-connected body of said reference-voltage diode and said first diode in said reverse direction in view of said control electrode, and a single driving circuit for supplying a switching signal provided between said control electrode and a junction between said second electrode and said fifth electrode.
Claim 2
Dependent Claim
152 words
A semiconductor device operable to be switched at high frequency, comprising, a field-effect transistor (2) having first and second electrodes and a control electrode, a bipolar transistor (3) having third, fourth and fifth electrodes, the fourth electrode being connected to said first electrode, and the fifth electrode being connected to said second electrode, at least a reference-voltage diode being connected in a reverse direction and at least a first diode being connected in a forward direction in view of said control electrode in a series manner in said order between said control electrode and said third electrode, a second diode being connected in parallel with a series-connected body of said reference-voltage diode and said first diode in said reverse direction in view of said control electrode, and a single driving circuit for supplying a switching signal provided between said control electrode and a junction between said second electrode and said fifth electrode.
Claim 3
Dependent Claim
45 words
A semiconductor device in accordance with claim 1, wherein said first electrode is a drain terminal, said second electrode is a source terminal, said third electrode is a base electrode, said fourth electrode is a collector electrode and said fifth electrode is an emitter electrode.
Claim 4
Dependent Claim
16 words
A semiconductor device in accordance with claim 1, wherein said bipolar transistor is an npn-type transistor.
Claim 5
Dependent Claim
38 words
A semiconductor device in accordance with claim 1 further including a third diode, said fourth electrode being connected with the cathode of said third diode, and said fifth electrode being connected with the anode of said third diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |