參數(shù)資料
型號(hào)： TLS24302
廠商： Texas Instruments, Inc.
英文描述： Magnetoresistive/Thin-Film Read/Write Preamplifiers(2通道磁阻/薄膜讀/寫(xiě)用前置放大器)
中文描述： 磁阻/薄膜讀/寫(xiě)前置放大器（2通道磁阻/薄膜讀/寫(xiě)用前置放大器）
文件頁(yè)數(shù)： 17/23頁(yè)
文件大?。?/td> 489K
代理商： TLS24302
TLS24302, TLS24306
2- AND 6-CHANNEL MAGNETORESISTIVE/THIN-FILM
READ/WRITE PREAMPLIFIERS
SQHS007A – DECEMBER 8, 1995 – REVISED DECEMBER 15, 1995
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
read mode
Taking CS low and R/W high activates the read mode. In the read mode, the feedback loop maintains a constant
MR-bias current having a long duration. Its constant is determined by a capacitor from CAP1 to GND. According
to these characteristics, the device acts as a transimpedance converter. In case of increasing R
(MR)
by the
reading signal, output potential changes as the potential of RDX becomes higher than RDY.
The magnitude of MR-bias current [I
I(BIAS)
] is set by the following formula:
I
I(BIAS)
G
(BIAS – MR)
V
RC
R
RC
K
b
R
RC
Where:
G
(BIAS – MR)
is the MR-bias-current gain in A/A.
K
b
is the
II(BIAS)
current constant of 40 V.
R
RC
is a resistor connected from RCS to GND.
V
RC
is the voltage across R
RC
.
buffered-head voltage
The preamplifiers have a buffered-head voltage (BHV) circuit that is brought out on BHV/IBON. The BHV
function monitors the MR-head voltage and includes an amplifier that boosts the head signal by up to five times
the actual signal level. As BHV is shared with IBON, the head voltage can be monitored during read modes.
idle mode
The idle mode is activated by taking CS high. The internal write-current source, and read-output buffer are
deactivated. The MR-bias-current source is active, but the bias current flows through internal dummy load
resistors instead of the MR element to allow fast recovery to read. The fault indicator is active in all states.
(11)
相關(guān)PDF資料
PDF描述
TLS24306 Magnetoresistive/Thin-Film Read/Write Preamplifiers(6通道磁阻/薄膜讀/寫(xiě)用前置放大器)
TLS24308 Magnetoresistive/Thin-Film Read/Write Preamplifiers(8通道磁阻/薄膜讀/寫(xiě)用前置放大器)
TLS24310 Magnetoresistive/Thin-Film Read/Write Preamplifiers(10通道磁阻/薄膜讀/寫(xiě)用前置放大器)
TLS24318 Magnetoresistive/Thin-Film Read/Write Preamplifiers(8通道磁阻/薄膜讀/寫(xiě)用前置放大器)
TLS24320 Magnetoresistive/Thin-Film Read/Write Preamplifiers(10通道磁阻/薄膜讀/寫(xiě)用前置放大器)
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