US3912950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bistable multivibrator circuit
Assignee: Sony Corp
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Filing: 1974-02-04
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Granted: 1975-10-14
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Expires: 1994-02-04
Abstract
Abstract A bistable multivibrator circuit, which is readily adaptable to monolithic integrated circuit technology, combines master and slave portions, thus reducing the components needed to provide a master/slave circuit operation when the multivibrator is used as a frequency divider.
Inventors
- 👤 Masahiro Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:18
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/289
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
304 words
A bistable multivibrator comprising: first and second voltage supply terminals; a first flip-flop comprising first and second transistors each having first, second and control electrodes, the first electrodes of said first and second transistors being connected to said first voltage supply terminal; at least a first common terminal having said second electrodes of said first and second transistors connected thereto; at least one current source connected between said first common terminal and said second voltage supply terminal for supplying a clock input signal to said first common terminal to cause said first and second transistors to alternate between a first condition in which both are nonconductive and a second condition in which only one of said first and second transistors is conductive; a second flip-flop comprising third and fourth transistors each having first, second and control electrodes, the first electrodes of said third and fourth transistors being connected to said first voltage supply terminal; means connecting said second electrodes of the third and fourth transistors to said second voltage supply terminal; and means coupling said first electrodes of said first and second transistors, respectively, to the control electrodes of said third and fourth transistors, respectively, said third and fourth transistors being alternately conductive and their states of conductivity being reversed in response to control from said first flip-flop, said coupling means being responsive to the condition of conductivity of said third and fourth transistors to determine the state of conductivity of said first and second transistors in said second condition such that, each time said first and second transistors change from their first condition to their second condition in response to said clock input signal, the states of conductivity of said first and second transistors are reversed from their prior states of conductivity during the preceding second condition of said first and second transistors.
Claim 2
Dependent Claim
304 words
A bistable multivibrator comprising: first and second voltage supply terminals; a first flip-flop comprising first and second transistors each having first, second and control electrodes, the first electrodes of said first and second transistors being connected to said first voltage supply terminal; at least a first common terminal having said second electrodes of said first and second transistors connected thereto; at least one current source connected between said first common terminal and said second voltage supply terminal for supplying a clock input signal to said first common terminal to cause said first and second transistors to alternate between a first condition in which both are nonconductive and a second condition in which only one of said first and second transistors is conductive; a second flip-flop comprising third and fourth transistors each having first, second and control electrodes, the first electrodes of said third and fourth transistors being connected to said first voltage supply terminal; means connecting said second electrodes of the third and fourth transistors to said second voltage supply terminal; and means coupling said first electrodes of said first and second transistors, respectively, to the control electrodes of said third and fourth transistors, respectively, said third and fourth transistors being alternately conductive and their states of conductivity being reversed in response to control from said first flip-flop, said coupling means being responsive to the condition of conductivity of said third and fourth transistors to determine the state of conductivity of said first and second transistors in said second condition such that, each time said first and second transistors change from their first condition to their second condition in response to said clock input signal, the states of conductivity of said first and second transistors are reversed from their prior states of conductivity during the preceding second condition of said first and second transistors.
Claim 3
Dependent Claim
26 words
eighth and ninth transistors having their base-emitter input circuits connected in parallel and their emitter-collector circuits connected, respectively, to said first and second common terminals, and
Claim 4
Dependent Claim
26 words
eighth and ninth transistors having their base-emitter input circuits connected in parallel and their emitter-collector circuits connected, respectively, to said first and second common terminals, and
Claim 5
Dependent Claim
99 words
A bisTable multivibrator according to claim 1; in which said current source comprises: an emitter-collector circuit of a fifth transistor, said clock input signal being applied to the base of said fifth transistor; an emitter-collector circuit of a sixth transistor included in said means connecting said second electrodes of the third and fourth transistors to the second voltage supply terminal, means connecting together said fifth and sixth transistors so as to constitute a differential amplifier; and a constant current transistor having an emitter-collector circuit connected in series with said emitter-collector circuit of both of said fifth and sixth transistors.
Claim 6
Dependent Claim
110 words
A bistable multivibrator according to claim 1; in which said means coupling said first electrodes of the first and second transistors with said control electrodes of the third and fourth transistors, respectively, includes a current steering gate circuit comprising: fifth and sixth transistors each having first, second and control electrodes, the first electrodes of said fifth and sixth transistors being coupled to the first electrodes of said third and fourth transistors, respectively, and the control electrodes of said fifth and sixth transistors being coupled to the first electrodes of said first and second transistors; and a second common terminal connected to the second electrodes of said fifth and sixth transistors.
Claim 7
Dependent Claim
34 words
a common transistor connected in series with the emitter-collector circuits of all of said seventh, eighth and ninth transistors, the clock input signal being applied to the base of said eighth and ninth transistors.
Claim 8
Dependent Claim
34 words
a common transistor connected in series with the emitter-collector circuits of all of said seventh, eighth and ninth transistors, the clock input signal being applied to the base of said eighth and ninth transistors.
Claim 9
Dependent Claim
19 words
A bistable multivibrator according to claim 3; in which said first and second common terminals are directly connected together.
Claim 10
Dependent Claim
39 words
A bistable multivibrator according to claim 3; comprising, in addition, a second current source connected to said second common terminal for supplying a clock input signal thereto to actuate said current steering gate circuit separately from said first flip-flop.
Claim 11
Dependent Claim
13 words
A bistable multivibrator according to claim 3; in which said current source comprises:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |