參數(shù)資料
型號(hào)： TRAC020LHQ36
廠商： ZETEX PLC
元件分類： 模擬信號(hào)調(diào)理
英文描述： TOTALLY RE-CONFIGURABLE ANALOG CIRCUIT - TRAC
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO36
封裝： QSOP-36
文件頁(yè)數(shù)： 12/15頁(yè)
文件大?。?/td> 225K
代理商： TRAC020LHQ36
CELL FUNCTION DETAILS
ADD (code 011)
Can be represented as an operational
amplifier with three resistors of equal value R.
The virtual earth at the inverting input gives:-
Eo = -R(Ea/R + Eb/R) = - (Ea + Eb)
The output is the inverted sum of the input
voltages.
NEGATE (code 010)
The negate function is provided by an adder,
but with only one input, therefore Eo=-Eb
NON INVERTING PASS (code 100)
Used for topological reasons. It provides a
route through the cell with no modification. i.e.
a unity gain amplifier
LOG (code 110)
Can be represented as an operational
amplifier with a pair of back to back diodes in
the negative feedback loop and an input
resistor R. The virtual earth at the inverting
input gives:-
Eo = -kT/q log (Ea/RIo + 1)
where
k = Boltzmann’s constant
T = absolute temperature
q = electron charge
Io=saturation current
ANTI - LOG (code 101)
Similar to the log circuit except that the diodes
and resistors are reversed. The output voltage
is therfore given as :-
Eo = -RIo (exp qEa/KT - 1)
When the signal is processed through both log
and anti-log the magnitude of the saturation
current and absolute temperature cancel.
TRAC020LH
6
相關(guān)PDF資料
PDF描述
TRAC020LH TOTALLY RE-CONFIGURABLE ANALOG CIRCUIT - TRAC
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