Patent EP0504974A1 successfully refreshed from Google Patents.
EP0504974A1
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EP
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Electrical supply circuit, in particular for APDs
Assignee: Koninklijke PTT Nederland NV
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Filing: 1992-03-11
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Granted: —
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Expires: 2012-03-11
Abstract
Abstract Supply circuit, especially for Avalanche Photo Diodes. The supply voltage is generated in a temperature-independent voltage source (VS1) and a temperature-dependent voltage source (VS2), both connected to a voltage amplifier (A1, A2), the output voltages being added to one another. The last-mentioned voltage supply comprises a temperature-independent voltage source (A3) whose output voltage is subtracted from the output voltage of a partially temperature-dependent voltage source in the form of a temperature-sensitive impedance, such as a diode (D) in the forward direction, connected to a current source (CS).
Inventors
- 👤 Han Hiong Tan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:26
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/95; H10F77/953; H10F77/959; G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/565; G05F1/567; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H03F3/087
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
Electrical supply circuit, characterised by a first, temperature-independent voltage source (VS1) whose output voltage (U1) is constant and which is connected to the input of a first voltage amplifier (A1) having a controllable gain (a1), and in addition, by a second temperature-dependent voltage source (VS2) whose output voltage (U2) is essentially equal to the mathematical product of a constant (C) and the temperature (t) measured at a measuring point and which is connected to the input of a second voltage amplifier (A2) having a controllable gain (a2), the output voltage of the first voltage amplifier and the output voltage of the second voltage amplifier being added to one another.
Claim 2
Dependent Claim
70 words
Electrical supply circuit according to Claim 1, characterised in that the second, temperature-dependent voltage source is formed by a third, temperature-independent voltage source (VS3) with a third, constant output voltage (U3) and by a series circuit of a current source and a temperature-dependent impedance (D), the third output voltage mentioned being equal to the voltage (U4) generated by the current source (CS) mentioned across the impedance and being subtracted therefrom.
Claim 3
Dependent Claim
25 words
Electrical supply circuit according to Claim 2, characterised in that the impedance mentioned is formed by a semiconductor diode (D) connected in the forward direction.
References Cited (Backward Citations)
DE3640242A1
Cited
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