Patent US5252931A successfully refreshed from Google Patents.
US5252931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide band frequency amplifiers
Assignee: Sony Corp
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Filing: 1992-07-17
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Granted: 1993-10-12
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Expires: 2012-07-17
Abstract
Abstract Disclosed is a a wide band frequency amplifier comprising the following: A first and a second transistor constitute a first push-pull amplifier circuit. A first current source is included, of which one end is connected to the second transistor base, the other end connected to ground. A first bias voltage source is interposed between the bases of the first and the second transistors. A third transistor is coupled with the first transistor in Darlington connection, thereby driving the first and the second transistors using an input signal. A fourth and a fifth transistor constitute a second push-pull amplifier circuit. A second current source is provided, of which one end is connected to the fourth transistor base, the other end connected to ground. A second bias voltage source is interposed between the bases of the fourth and the fifth transistors. A sixth transistor is coupled with the fourth transistor in Darlington connection, thereby driving the fourth and the fifth transistors using the input signal. A phase element is interposed between the second transistor base and the output end of the second push-pull amplifier circuit, thus causing the second and the fifth transistors to operate in Darlington connection at a trailing edge of the input signal.
Inventors
- 👤 Seiichi Nishiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:27
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/02; H03F; H03F3/00; H03F3/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
A wide band frequency amplifier comprising: a first transistor and a second transistor forming a first push-pull amplifier circuit; a first current source having a first end connected to a base of said second transistor and a second end connected to ground; a first bias voltage source connected between a base of said first transistor and said base of said second transistor; a third transistor coupled to said first transistor in Darlington connection, said third transistor driving said first and second transistors using an input signal; a fourth transistor and a fifth transistor forming a second push-pull amplifier circuit; a second current source having a first end connected to a base of said fifth transistor and a second end connected to ground; a second bias voltage source connected between a base of said fourth transistor and said base of said fifth transistor; a sixth transistor coupled to said fourth transistor in Darlington connection, said sixth transistor driving said fourth and fifth transistors using said input signal; and a phase element connected between said base of said second transistor and an output end of said second push-pull amplifier circuit, said phase element causing said second and fifth transistors to operate in Darlington connection at a trailing edge of said input signal.
Claim 2
Dependent Claim
210 words
A wide band frequency amplifier comprising: a first transistor and a second transistor forming a first push-pull amplifier circuit; a first current source having a first end connected to a base of said second transistor and a second end connected to ground; a first bias voltage source connected between a base of said first transistor and said base of said second transistor; a third transistor coupled to said first transistor in Darlington connection, said third transistor driving said first and second transistors using an input signal; a fourth transistor and a fifth transistor forming a second push-pull amplifier circuit; a second current source having a first end connected to a base of said fifth transistor and a second end connected to ground; a second bias voltage source connected between a base of said fourth transistor and said base of said fifth transistor; a sixth transistor coupled to said fourth transistor in Darlington connection, said sixth transistor driving said fourth and fifth transistors using said input signal; and a phase element connected between said base of said second transistor and an output end of said second push-pull amplifier circuit, said phase element causing said second and fifth transistors to operate in Darlington connection at a trailing edge of said input signal.
Claim 3
Dependent Claim
22 words
A wide band frequency amplifier according to claim 1, wherein said fifth transistor is n times the size of said fourth transistor.
Claim 4
Dependent Claim
172 words
A wide band frequency amplifier comprising: first and second transistors forming a push-pull amplifier circuit; a first current source having a first end connected to a base of said second transistor and a second end connected to ground; a first bias voltage source connected between a base of said first transistor and said base of said second transistor; a third transistor coupled to said first transistor in Darlington connection, said third transistor driving said first and second transistors using an input signal; a fourth transistor connected to said third transistor in parallel, a base of said fourth transistor receiving said input signal; a second current source having a first end connected to an emitter of said fourth transistor and a second end connected to ground; and a phase element connected between said emitter of said fourth transistor, said second current source and said base of said second transistor, said phase element pulling a base current of said second transistor into said second current source at a trailing edge of said input signal.
Claim 5
Dependent Claim
172 words
A wide band frequency amplifier comprising: first and second transistors forming a push-pull amplifier circuit; a first current source having a first end connected to a base of said second transistor and a second end connected to ground; a first bias voltage source connected between a base of said first transistor and said base of said second transistor; a third transistor coupled to said first transistor in Darlington connection, said third transistor driving said first and second transistors using an input signal; a fourth transistor connected to said third transistor in parallel, a base of said fourth transistor receiving said input signal; a second current source having a first end connected to an emitter of said fourth transistor and a second end connected to ground; and a phase element connected between said emitter of said fourth transistor, said second current source and said base of said second transistor, said phase element pulling a base current of said second transistor into said second current source at a trailing edge of said input signal.
Claim 6
Dependent Claim
102 words
A wide band push-pull amplifier comprising: an output push-pull circuit containing a second NPN transistor and a third PNP transistor; a first transistor provided in an input stage in order to drive said second NPN transistor, said first transistor coupled to said second NPN transistor in Darlington connection; bias circuit means provided between an emitter of said first transistor and a current source, for supplying a bias current to a base of said second NPN transistor and to a base of said third PNP transistor; and a fourth transistor connected between said base of said third PNP transistor and a power source.
Claim 7
Dependent Claim
102 words
A wide band push-pull amplifier comprising: an output push-pull circuit containing a second NPN transistor and a third PNP transistor; a first transistor provided in an input stage in order to drive said second NPN transistor, said first transistor coupled to said second NPN transistor in Darlington connection; bias circuit means provided between an emitter of said first transistor and a current source, for supplying a bias current to a base of said second NPN transistor and to a base of said third PNP transistor; and a fourth transistor connected between said base of said third PNP transistor and a power source.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-10-11 | 1997-04-12 | 1997-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-11 | 2001-04-12 | 2001-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-11 | 2005-04-12 | 2005-10-12 | $7700.00 | Window Closed / Lapsed |