US3916293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal clipping circuit utilizing a P-N junction device
Assignee: Sony Corp
•
Filing: 1974-12-03
•
Granted: 1975-10-28
•
Expires: 1994-12-03
Abstract
Abstract A clipper circuit utilizing a P-N junction device for clipping an input signal thereto in which a clipping level controller is provided for detecting a voltage across a P-N junction of the P-N junction device and controlling the clipping level in response to the detected voltage thereby to compensate for the nonlinear voltage-current characteristic of the P-N junction device.
Inventors
- 👤 Shoji Omori
- 👤 Kenji Ito
- 👤 Yoshio Ishigaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02; G; G06; G06G; G06G7/00; G06G7/12; G06G7/25
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
152 words
A circuit for clipping a signal comprising: a. a pair of input terminals to be supplied with an input signal therebetween; b. a P-N junction device connected to one of said pair of input terminals at its one end so that the input signal is applied to a P-N junction thereof; c. a resistor connected to the other end of said P-N junction device at its one end; d. voltage supplying means connected between the other end of said resistor and the other of said pair of input terminals for supplying a bias voltage to said P-N junction to determine a conductive voltage level thereof: e. detecting means for detecting a voltage across the P-N junction of said P-N junction device and controlling the value of said bias voltage supplied to said P-N junction device in response to the detected voltage; and f. means for deriving an output signal from said resistor.
Claim 2
Dependent Claim
152 words
A circuit for clipping a signal comprising: a. a pair of input terminals to be supplied with an input signal therebetween; b. a P-N junction device connected to one of said pair of input terminals at its one end so that the input signal is applied to a P-N junction thereof; c. a resistor connected to the other end of said P-N junction device at its one end; d. voltage supplying means connected between the other end of said resistor and the other of said pair of input terminals for supplying a bias voltage to said P-N junction to determine a conductive voltage level thereof: e. detecting means for detecting a voltage across the P-N junction of said P-N junction device and controlling the value of said bias voltage supplied to said P-N junction device in response to the detected voltage; and f. means for deriving an output signal from said resistor.
Claim 3
Dependent Claim
56 words
A circuit according to claim 1, wherein said voltage supplying means comprises first means for producing a constant voltage and second means for producing a variable voltage in addition to said constant voltage, said second means being controlled by said detecting means so that said variable voltage is proportional to the voltage across said P-N junction.
Claim 4
Dependent Claim
25 words
A circuit according to claim 2, wherein said second means produces a voltage equal to the voltage across said P-N junction as said variable voltage.
Claim 5
Dependent Claim
31 words
A circuit according to claim 2, wherein said P-N junction device comprises a diode connected between said one of the pair of input terminal and said one end of said resistor.
Claim 6
Dependent Claim
35 words
A circuit according to claim 2, wherein said P-N junction device comprises a transistor with a base-emitter junction connected between said one of the pair of input terminal and said one end of said resistor.
Claim 7
Dependent Claim
38 words
A circuit according to claim 2, wherein said detecting means comprises a differential amplifier with a pair of inputs connected to both ends of said P-N junction device respectively, and an output connected to said voltage supplying means.
Claim 8
Dependent Claim
97 words
A circuit according to claim 6, wherein said voltage supplying means comprises a first additional transistor with a collector connected to a voltage source and a emitter connected to the other of said pair of input terminals through a first additional resistor, the connecting point between said emitter and said first additional resistor being connected to said other end of said resistor, and a second additional transistor with a collector connected to said voltage source, an emitter connected to a base of said first additional transistor and a base connected to the output of said differential amplifier.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |