Patent EP0366294A2 successfully refreshed from Google Patents.
EP0366294A2
Expired / Lapsed
EP
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TTL-ECL level converting circuit
Assignee: NEC Corp
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Filing: 1989-10-06
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Granted: —
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Expires: 2009-10-06
Abstract
Abstract A TTL-ECL converting circuit comprises a Schottky barrier diode (D₁) having a cathode connected to an input terminal (IN) for a TTL signal and an anode connected to a first connection node, a resistor (R₁) having its one end connected to a high voltage supply line (V CC ) and its other end connected to the first connection node, a first transistor (Q₁) having a collector connected to the high voltage supply line (V CC ), a base connected to the first connection node and an emitter connected to a second connection node, a level shift resistor (R₃) having its one end connected to the second connection node and its other end connected to a third connection node, a level shift diode (D₂) having its cathode connected to the third connection node and its anode connected to a fourth connection node, a constant current source (Ics) having its end connected to the fourth connection node and its other end connected to a low voltage supply line (V EE ), a second transistor (Q₂) having a collector connected to the first connection node, a base connected to the third connection node and an emitter connected through another resistor (R₂) to an intermediate voltage supply line (GND), and an emitter follower (Q₃) connected between the intermediate voltage supply line (GND), and the low voltage supply line (V EE ) and having an input connected to the fourth connection node and an output connected to an output terminal for an ECL signal.
Inventors
- 👤 Kouji C/O Nec Corporation Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 11:15
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/0175; H03K19/018; H03K19/01806; H03K19/003; H03K19/00346; H03K19/00353; H03K19/00369; H03K19/00376
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
229 words
A TTL-ECL converting circuit comprising a Schottky barrier diode having a cathode connected to an input terminal for a TTL signal and an anode connected to a first connection node, a resistor having its one end connected to a high voltage supply line and its other end connected to said first connection node, a first transistor having a collector connected to said high voltage supply line, a base connected to said first connection node and an emitter connected to a second connection node, a first level shift means having its one end connected to said second connection node and its other end connected to a third connection node, a second level shift means having its one end connected to said third connection node and its other end connected to a fourth connection node, a constant current source having its end connected to said fourth connection node and its other end connected to a low voltage supply line, a second transistor having a collector connected to said first connection node, a base connected to said third connection node and an emitter connected through another resistor to an intermediate voltage supply line, and an emitter follower connected between said intermediate voltage supply line and said low voltage supply line and having an input connected to said fourth connection node and an output connected to an output terminal for an ECL signal.
Claim 2
Dependent Claim
229 words
A TTL-ECL converting circuit comprising a Schottky barrier diode having a cathode connected to an input terminal for a TTL signal and an anode connected to a first connection node, a resistor having its one end connected to a high voltage supply line and its other end connected to said first connection node, a first transistor having a collector connected to said high voltage supply line, a base connected to said first connection node and an emitter connected to a second connection node, a first level shift means having its one end connected to said second connection node and its other end connected to a third connection node, a second level shift means having its one end connected to said third connection node and its other end connected to a fourth connection node, a constant current source having its end connected to said fourth connection node and its other end connected to a low voltage supply line, a second transistor having a collector connected to said first connection node, a base connected to said third connection node and an emitter connected through another resistor to an intermediate voltage supply line, and an emitter follower connected between said intermediate voltage supply line and said low voltage supply line and having an input connected to said fourth connection node and an output connected to an output terminal for an ECL signal.
Claim 3
Dependent Claim
29 words
A circuit claimed in Claim 1 further including its diode having an anode connected to said intermediate voltage supply line and its cathode connected to said fourth connection node.
Claim 4
Dependent Claim
66 words
A circuit claimed in Claim 1 wherein said first level shift means is composed of a resistor having its one end connected to said second connection node and its other end connected to said third connection node, and said second level shift means is composed of a diode having its anode connected to said third connection node and its cathode connected to said fourth connection node.
Claim 5
Dependent Claim
64 words
A circuit claimed in Claim 1 wherein said first level shift means is composed of a diode having its anode connected to said second connection node and its cathode connected to said third connection node, and said second level shift means is composed of another diode having its anode connected to said third connection node and its cathode connected to said fourth connection node.
Claim 6
Dependent Claim
69 words
A circuit claimed in Claim 1 wherein said first level shift means is composed of a resistor having its one end connected to said second connection node and its other end connected to said third connection node, and said second level shift means is composed of a another resistor having its one end connected to said third connection node and its other end connected to said fourth connection node.
Claim 7
Dependent Claim
66 words
A circuit claimed in Claim 1 wherein said first level shift means is composed of a diode having its anode connected to said second connection node and its cathode connected to said third connection node, and said second level shift means is composed of a resistor having its one end connected to said third connection node and its other end connected to said fourth connection node.
Claim 8
Dependent Claim
212 words
A TTL-ECL converting circuit comprising a Schottky barrier diode having a cathode connected to an input terminal for a TTL signal and an anode connected to a first connection node, a resistor having its one end connected to a high voltage supply line and its other end connected to said first connection node, a first transistor having a collector connected to said high voltage supply line, a base connected to said first connection node and an emitter connected to a second connection node, a level shift means having its one end connected to said second connection node, an intermediate node forming a third connection node, and its other end connected to a fourth connection node, a constant current source having its end connected to said fourth connection node and its other end connected to a low voltage supply line, a second transistor having a collector connected to said first connection node, a base connected to said third connection node and an emitter connected through second resistor to an intermediate voltage supply line, and an emitter follower connected between said intermediate voltage supply line and said an low voltage supply line and having an input connected to said fourth connection node and an output connected to an output terminal for an ECL signal.
Claim 9
Dependent Claim
212 words
A TTL-ECL converting circuit comprising a Schottky barrier diode having a cathode connected to an input terminal for a TTL signal and an anode connected to a first connection node, a resistor having its one end connected to a high voltage supply line and its other end connected to said first connection node, a first transistor having a collector connected to said high voltage supply line, a base connected to said first connection node and an emitter connected to a second connection node, a level shift means having its one end connected to said second connection node, an intermediate node forming a third connection node, and its other end connected to a fourth connection node, a constant current source having its end connected to said fourth connection node and its other end connected to a low voltage supply line, a second transistor having a collector connected to said first connection node, a base connected to said third connection node and an emitter connected through second resistor to an intermediate voltage supply line, and an emitter follower connected between said intermediate voltage supply line and said an low voltage supply line and having an input connected to said fourth connection node and an output connected to an output terminal for an ECL signal.
Claim 10
Dependent Claim
29 words
A circuit claimed in Claim 7 further including its diode having an anode connected to said intermediate voltage supply line and its cathode connected to said fourth connection node.
Claim 11
Dependent Claim
55 words
A circuit claimed in Claim 8 wherein said level shift means includes a resistor having its one end connected to said second connection node and its other end connected to said third connection node, and a diode having its anode connected to said third connection node and its cathode connected to said fourth connection node.
Claim 12
Dependent Claim
53 words
A circuit claimed in Claim 8 wherein said level shift means includes a diode having its anode connected to said second connection node and its cathode connected to said third connection node, and another diode having its anode connected to said third connection node and its cathode connected to said fourth connection node.
Claim 13
Dependent Claim
57 words
A circuit claimed in Claim 8 wherein said level shift means includes a resistor having its one end connected to said second connection node and its other end connected to said third connection node, and another resistor having its one end connected to said third connection node and its other end connected to said fourth connection node.
Claim 14
Dependent Claim
55 words
A circuit claimed in Claim 8 wherein said level shift means includes a diode having its anode connected to said second connection node and its cathode connected to said third connection node, and a resistor having its one end connected to said third connection node and its other end connected to said fourth connection node.
References Cited (Backward Citations)
No citation records indexed.
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