What technique is used in a Sample-and-Hold (S/H) circuit to minimize voltage 'droop' during the hold interval?
Explanation
In a sample-and-hold circuit, the voltage droop during the 'hold' period is caused by tiny leakage currents from the switch and the buffer amplifier's input, which slowly charge or discharge the hold capacitor. To minimize this, a switch with very low off-state leakage and a buffer with very high input impedance (like a FET-input op-amp) are used.
Other questions
According to the component data table, what is the typical slew rate, in Volts per microsecond, for the OP-16E operational amplifier?
What is the primary purpose of applying positive feedback to a comparator circuit, as described in the section on Schmitt triggers?
Who is credited with designing the first commercially successful monolithic operational amplifier, the Fairchild µA709, in 1965?
For the AD549L op-amp listed in Table 4.2, what is the specified maximum input current in nanoamps?
What is the primary function of the 'daughterboard' solution mentioned in the text for dealing with a discontinued IC?
What is the maximum output current in milliamperes for the LM675 op-amp according to the data table?
In the active peak detector circuit, what problem is caused by the op-amp's finite slew rate?
For the OPA541B power op-amp, what is the specified maximum supply current in milliamperes?
What is the primary characteristic of a 'programmable op-amp'?
What does a dot in the 'OUT' column of the 'Swing to supplies' section of the op-amp data table signify?
In the context of op-amp stability and frequency compensation, what is the stability criterion for a feedback amplifier?
What is the typical gain-bandwidth product (fT) in MHz for the LTC1052 chopper-stabilized op-amp?
What is 'dielectric absorption' in a capacitor, as described in the text?
For the HA2645 op-amp, what is its minimum specified Common Mode Rejection Ratio (CMRR) in dB?
In the context of op-amp limitations, what trade-off is often faced when choosing between bipolar and FET-input op-amps?
What is the typical slew rate in Volts per microsecond for the SG1173 monolithic power op-amp?
According to the table of recommended op-amps, what is the typical slew rate in Volts per microsecond for the OP-27E?
What was the key improvement of the LM301 op-amp over the earlier µA709?
For the LM344 high-voltage op-amp, what is the maximum rated supply voltage in volts?
In a differentiator circuit, why is it necessary to 'roll off the differentiator action at some maximum frequency'?
What is the maximum differential input voltage specified for the ICH8500A op-amp?
How does the 'T-network' trick shown in Figure 4.49 help in op-amp integrator design?
What is the typical output current in amperes for the OPA512 power op-amp?
What does the term 'dominant-pole compensation' refer to in op-amp design?
For the popular 324 quad op-amp, which statement accurately describes its output swing capability when V- is ground?
What is the specified minimum gain in dB for the ICL7650S chopper-stabilized op-amp?
In the logarithmic converter circuit shown in Figure 4.35, what is the role of the second op-amp?
What is the maximum offset drift in microvolts per degree Celsius for the AD744K op-amp?
Which op-amp is described as the 'industry standard for many years' with internal compensation and was introduced by Fairchild?
What is the specified maximum supply current in milliamperes for the 1436 high-voltage op-amp?
In the 'active clamp' circuit shown in Figure 4.43, what happens when the input voltage exceeds +10 volts?
What is the maximum supply voltage specified for the AD654 V/F converter, as shown in the VCO table?
Which popular op-amp is described as being for 'single-supply operation' and is the dual version of the 324 quad op-amp?
According to the table for high-voltage op-amps, what is the Pdiss (power dissipation) at 50 degrees Celsius for the PA12 from Apex?
What is the primary reason that a simple integrator circuit (Figure 4.47) with its input grounded will still have its output 'wander off'?
What is the typical transition frequency (fT) in MHz for the OP-90E precision micropower op-amp?
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What is the maximum supply voltage for the LM12 monolithic power op-amp?
Why would an uncompensated op-amp like a 748 oscillate if connected as a simple follower?
What is the maximum offset voltage, in millivolts, for the LT1028A precision op-amp?
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What is the maximum junction temperature (Tj max) for a 2N3055 power transistor in a TO-3 package?
What is the purpose of the resistor-diode network described in footnote (h) on page 207?
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What is the typical power dissipation in watts for the LH4104 power op-amp?
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