US4866304A
Expired / Lapsed
US
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BICMOS NAND gate
Assignee: Motorola Solutions Inc
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Filing: 1988-05-23
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Granted: 1989-09-12
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Expires: 2008-05-23
Abstract
Abstract A BICMOS NAND gate has P channel transistors, N channel transistors, and NPN transistors. The NPN transistors and the P channel transistors combine to provide logic high drive which avoids having the comparatively slow P channel transistors tied together. The P channel transistors are combined with NPN transistors to avoid the accumulation of capacitance that must be driven by a P channel transistor as the number of inputs increases. This avoids the typical problem of having the P channel transistors having to drive more capacitance as the number of inputs increases.
Inventors
- 👤 Ruey J. Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:54
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/094; H03K19/0944; H03K19/09448
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
461 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first resistor having a first terminal coupled to the control electrode of the first NPN transistor and a second terminal coupled to the second current electrode of the first NPN transistor; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second resistor having a first terminal coupled to the control electrode of the second NPN transistor and a second terminal coupled to the second current electrode of the second NPN transistor; a third P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a third input signal, and a second current electrode; a third NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the third P channel transistor, and a second current electrode coupled to the output node; a third resistor having a first terminal coupled to the control electrode of the third NPN transistor and a second terminal coupled to the second current electrode of the third NPN transistor; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first, second, and third input signals are a logic high and blocking said current path if one or a more of the first, second, and third input signals are a logic low; said pull-down means comprising first, second and third N channel transistors connected in series between the output node and the second power supply terminal, said first N channel transistor having a control electrode for receiving the first input signal, said second N channel transistor having a control electrode for receiving the second input signal, and said third N channel resistor having a control electrode for receiving the third input signal.
Claim 2
Dependent Claim
461 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first resistor having a first terminal coupled to the control electrode of the first NPN transistor and a second terminal coupled to the second current electrode of the first NPN transistor; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second resistor having a first terminal coupled to the control electrode of the second NPN transistor and a second terminal coupled to the second current electrode of the second NPN transistor; a third P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a third input signal, and a second current electrode; a third NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the third P channel transistor, and a second current electrode coupled to the output node; a third resistor having a first terminal coupled to the control electrode of the third NPN transistor and a second terminal coupled to the second current electrode of the third NPN transistor; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first, second, and third input signals are a logic high and blocking said current path if one or a more of the first, second, and third input signals are a logic low; said pull-down means comprising first, second and third N channel transistors connected in series between the output node and the second power supply terminal, said first N channel transistor having a control electrode for receiving the first input signal, said second N channel transistor having a control electrode for receiving the second input signal, and said third N channel resistor having a control electrode for receiving the third input signal.
Claim 3
Dependent Claim
340 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first resistor having a first terminal coupled to the control electrode of the first NPN transistor and a second terminal coupled to the second current electrode of the first NPN transistor; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second resistor having a first terminal coupled to the control electrode of the second NPN transistor and a second terminal coupled to the second current electrode of the second NPN transistor; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first and second input signals are a logic high and blocking said current path if one or a more of the first and second, input signals are a logic low; said pull-down means comprising first and second N channel transistors connected in series between the output node and the second power supply terminal, said first N channel transistor having a control electrode for receiving the first input signal and said second N channel transistor having a control electrode for receiving the second input signal.
Claim 4
Dependent Claim
340 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first resistor having a first terminal coupled to the control electrode of the first NPN transistor and a second terminal coupled to the second current electrode of the first NPN transistor; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second resistor having a first terminal coupled to the control electrode of the second NPN transistor and a second terminal coupled to the second current electrode of the second NPN transistor; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first and second input signals are a logic high and blocking said current path if one or a more of the first and second, input signals are a logic low; said pull-down means comprising first and second N channel transistors connected in series between the output node and the second power supply terminal, said first N channel transistor having a control electrode for receiving the first input signal and said second N channel transistor having a control electrode for receiving the second input signal.
Claim 5
Dependent Claim
485 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first N channel transistor having a control electrode for receiving the first input signal, a first current electrode coupled to the base of the first NPN transistor, and a second current electrode coupled to a second power supply terminal; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second N channel transistor having a control electrode for receiving the second input signal, a first current electrode coupled to the base of the second NPN transistor, and a second current electrode coupled to the second power supply terminal; a third P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a third input signal, and a second current electrode; a third NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the third P channel transistor, and a second current electrode coupled to the output node; a third N channel transistor having a control electrode for receiving the third input signal, a first current electrode coupled to the base of the third NPN transistor, and a second current electrode coupled to the second power supply terminal; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first, second, and third input signals are a logic high and blocking said current path if one or a more of the first, second, and third input signals are a logic low; said pull-down means comprising fourth, fifth, and sixth N channel transistors connected in series between the output node and the second power supply terminal, said forth N channel transistor having a control electrode for receiving the first input signal, said fifth N channel transistor having a control electrode for receiving the second input signal, and said sixth N channel transistor having a control electrode for receiving the third input signal.
Claim 6
Dependent Claim
485 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first N channel transistor having a control electrode for receiving the first input signal, a first current electrode coupled to the base of the first NPN transistor, and a second current electrode coupled to a second power supply terminal; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second N channel transistor having a control electrode for receiving the second input signal, a first current electrode coupled to the base of the second NPN transistor, and a second current electrode coupled to the second power supply terminal; a third P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a third input signal, and a second current electrode; a third NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the third P channel transistor, and a second current electrode coupled to the output node; a third N channel transistor having a control electrode for receiving the third input signal, a first current electrode coupled to the base of the third NPN transistor, and a second current electrode coupled to the second power supply terminal; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first, second, and third input signals are a logic high and blocking said current path if one or a more of the first, second, and third input signals are a logic low; said pull-down means comprising fourth, fifth, and sixth N channel transistors connected in series between the output node and the second power supply terminal, said forth N channel transistor having a control electrode for receiving the first input signal, said fifth N channel transistor having a control electrode for receiving the second input signal, and said sixth N channel transistor having a control electrode for receiving the third input signal.
Claim 7
Dependent Claim
356 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first N channel resistor having a control electrode for receiving the first input signal, a first current electrode coupled to the base of the first NPN transistor, and a second current electrode coupled to a second power supply terminal; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode or receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second N channel transistor having a control electrode for receiving the second input signal, a first current electrode coupled to the base of the second NPN transistor, and a second current electrode coupled to the second power supply terminal; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first and second input signals are a logic high and blocking said current path if one or a more of the first and second input signals are a logic low; said pull-down means comprising third and fourth N channel transistors connected in series between the output node and the second power supply terminal, said third N channel transistor having a control electrode for receiving the first input signal and said fourth N channel transistor having a control electrode for receiving the second input signal.
Claim 8
Dependent Claim
356 words
A NAND gate comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first N channel resistor having a control electrode for receiving the first input signal, a first current electrode coupled to the base of the first NPN transistor, and a second current electrode coupled to a second power supply terminal; a second P channel transistor having a first current electrode coupled to the first power supply terminal, a control electrode or receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second N channel transistor having a control electrode for receiving the second input signal, a first current electrode coupled to the base of the second NPN transistor, and a second current electrode coupled to the second power supply terminal; and pull-down means, coupled between the output node and a second power supply terminal, for providing a current path between the output node and the second power supply terminal only if the first and second input signals are a logic high and blocking said current path if one or a more of the first and second input signals are a logic low; said pull-down means comprising third and fourth N channel transistors connected in series between the output node and the second power supply terminal, said third N channel transistor having a control electrode for receiving the first input signal and said fourth N channel transistor having a control electrode for receiving the second input signal.
Claim 9
Dependent Claim
404 words
A NAND gate, comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first resistor having a first terminal coupled to the control electrode of the first NPN transistor and a second terminal coupled to the second current electrode of the first NPN transistor; a second P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to th first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second resistor having a first terminal coupled to the control electrode of the second NPN transistor and a second terminal coupled to the second current electrode of the second NPN transistor; and a first P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a third input signal, and a second current electrode; a third NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the third P channel transistor, and a second current electrode coupled to the output node; and a third resistor having a first terminal coupled to the control electrode of the third NPN transistor and a second terminal coupled to the second current electrode of the third NPN transistor; and a first N channel transistor, a second N channel transistor, and a third N channel transistor coupled in series between the output node and a second power supply terminal, said first N channel transistor having a control electrode for receiving the first input signal, said second N channel transistor having a control electrode for receiving the second input signal, and said third N channel transistor having a control electrode for receiving the third input signal.
Claim 10
Dependent Claim
404 words
A NAND gate, comprising: a first P channel transistor having a first current coupled to a first power supply terminal, a control electrode for receiving a first input signal, and a second current electrode; a first NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the first P channel transistor, and a second current electrode coupled to an output node, an output signal of the NAND gate being provided on the output node; a first resistor having a first terminal coupled to the control electrode of the first NPN transistor and a second terminal coupled to the second current electrode of the first NPN transistor; a second P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a second input signal, and a second current electrode; a second NPN transistor having a first current electrode coupled to th first power supply terminal, a control electrode coupled to the second current electrode of the second P channel transistor, and a second current electrode coupled to the output node; a second resistor having a first terminal coupled to the control electrode of the second NPN transistor and a second terminal coupled to the second current electrode of the second NPN transistor; and a first P channel transistor having a first current coupled to the first power supply terminal, a control electrode for receiving a third input signal, and a second current electrode; a third NPN transistor having a first current electrode coupled to the first power supply terminal, a control electrode coupled to the second current electrode of the third P channel transistor, and a second current electrode coupled to the output node; and a third resistor having a first terminal coupled to the control electrode of the third NPN transistor and a second terminal coupled to the second current electrode of the third NPN transistor; and a first N channel transistor, a second N channel transistor, and a third N channel transistor coupled in series between the output node and a second power supply terminal, said first N channel transistor having a control electrode for receiving the first input signal, said second N channel transistor having a control electrode for receiving the second input signal, and said third N channel transistor having a control electrode for receiving the third input signal.
References Cited (Backward Citations)
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |