Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Patent
1996-03-21
1998-04-21
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
330252, H03M 114
Patent
active
057422486
ABSTRACT:
A differential amplifier comprises two input transistors and two cross-coupled transistors arranged in a translinear loop. A difference voltage across a resistance connected between the emitters of the cross-coupled transistors is equal to a difference voltage across the input terminals plus the sum of the offset voltages across resistors arranged in series with the respective emitters of the input transistors. The difference current through the cross-coupled transistors is replicated in output transistors, thereby producing an output signal amplitude larger than the input signal amplitude across a resistance coupled between the emitters of the output transistors. The differential amplifier is suitable, inter alia, as an interpolating residue signal amplifier with additional underflow and overflow ranges in multi-step dual-residue analog-to-digital converters.
REFERENCES:
patent: 4267516 (1981-05-01), Traa
patent: 5184130 (1993-02-01), Mangelsdorf
patent: 5353027 (1994-10-01), Vorenkamp et al.
patent: 5525930 (1996-06-01), Pothast et al.
Verdaasdonk Johannes P. M.
Vorenkamp Pieter
U.S. Philips Corporation
Young Brian K.
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