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List Of LM-series Integrated Circuits
The following is a list of LM-series integrated circuits. Many were among the first analog integrated circuits commercially produced since late 1965; some were groundbreaking innovations. As of 2007, many are still being used. The LM series originated with integrated circuits made by National Semiconductor. The prefix LM stands for ''linear monolithic'', referring to the analog components integrated onto a single piece of silicon. Because of the popularity of these parts, many of them were second-sourced by other manufacturers who kept the sequence number as an aid to identification of compatible parts. Several generations of pin-compatible descendants of the original parts have since become ''de facto'' standard electronic components. Operational amplifiers Differential comparators Current-mode (Norton) amplifiers Instrumentation amplifiers Audio amplifiers Precision reference Voltage regulators Voltage-to-frequency converters Current so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linear Regulator
300px, Block scheme for voltage regulator in an electronic circuit In electronics, a linear regulator is a voltage regulator used to maintain a steady voltage. The resistance of the regulator varies in accordance with both the input voltage and the load, resulting in a constant voltage output. The regulating circuit varies its resistance, continuously adjusting a voltage divider network to maintain a constant output voltage and continually dissipating the difference between the input and regulated voltages as waste heat. By contrast, a ''switching regulator'' uses an active device that switches on and off to maintain an average value of output. Because the regulated voltage of a linear regulator must always be lower than input voltage, efficiency is limited and the input voltage must be high enough to always allow the active device to reduce the voltage by some amount. Linear regulators may place the regulating device in parallel with the load ( shunt regulator) or may place the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4000-series Integrated Circuits
The 4000 series is a CMOS logic family of integrated circuits (ICs) first introduced in 1968 by RCA. It was slowly migrated into the 4000B buffered series after about 1975. It had a much wider supply voltage range than any contemporary logic family (3V to 18V recommended range for "B" series). Almost all IC manufacturers active during this initial era fabricated models for this series. Its naming convention is still in use today. History The 4000 series was introduced as the ''CD4000 COS/MOS'' series in 1968 by RCA as a lower power and more versatile alternative to the 7400 series of transistor-transistor logic (TTL) chips. The logic functions were implemented with the newly introduced CMOS, Complementary Metal–Oxide–Semiconductor (CMOS) technology. While initially marketed with "COS/MOS" labeling by RCA (which stood for Complementary Symmetry Metal-Oxide Semiconductor), the shorter ''CMOS'' terminology emerged as the industry preference to refer to the technology. The first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Linear Integrated Circuits
The following is a list of linear integrated circuits. Many were among the first analog chip, analog integrated circuits commercially produced; some were groundbreaking innovations, and many are still being used. See also * Linear integrated circuit * List of LM-series integrated circuits * 4000-series integrated circuits * List of 4000-series integrated circuits * 7400-series integrated circuits * List of 7400-series integrated circuits References {{DEFAULTSORT:Linear integrated circuits Electronic design Electronics lists Linear integrated circuits, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linear Integrated Circuit
A linear integrated circuit or analog chip is a set of miniature electronic analog circuits formed on a single piece of semiconductor material. Description The voltage and current at specified points in the circuits of analog chips vary continuously over time. In contrast, digital chips only assign meaning to voltages or currents at discrete levels. In addition to transistors, analog chips often include a larger number of passive elements (capacitors, resistors, and inductors) than digital chips. Inductors tend to be avoided because of their large physical size, and difficulties incorporating them into monolithic semiconductor ICs. Certain circuits such as gyrators can often act as equivalents of inductors, while constructed only from transistors and capacitors. Analog chips may also contain digital logic elements to replace some analog functions, or to allow the chip to communicate with a microprocessor. For this reason, and since logic is commonly implemented using CMOS technol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LM13700
The LM13700 is an integrated circuit (IC) containing two current-controlled operational transconductance amplifiers (OTA), each having differential inputs and a push-pull output. Linearizing diodes at the input can optionally be used by applying a bias current into I to reduce distortion and allow increased input levels. The output bias can be programmed using an optional current into the I pin. Two unconnected Darlington emitter follower output buffers capable of 20 mA each can be optionally connected to each OTA's output to complement the OTA's wide dynamic range. The bias currents (and hence the output DC levels) of the Darlington output buffers on the LM13700 are independent of the I pin (unlike those on the LM13600). This may result in performance superior to that of the LM13600 in audio applications. This chip historically has been useful in audio electronics, especially in analog synthesizer circuits like voltage controlled oscillators, voltage controlled filters, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LM3916
The LM3914 is an integrated circuit (IC), designed by National Semiconductor in the late 1970s, used to operate displays that visually show the magnitude of an analog signal. It can drive up to 10 LEDs, LCDs, or vacuum fluorescent displays on its outputs. The linear scaling of the output thresholds makes the device usable, for example, as a voltmeter. In the basic configuration it provides a ten step scale which is expandable to over 100 segments with other LM3914 ICs in series. Features The LM3914 / LM3915 / LM3916 are identical except for the ten resistor divider inside each part. * LM3914 – linear steps, scaled by a resistor divider consisting of ten 1000 ohm resistors. * LM3915 – 3 dB logarithmic steps, scaled by a resistor divider consisting of 6630, 4690, 3310, 2340, 1660, 1170, 830, 590, 410, 1000 ohm resistors. * LM3916 – VU-meter steps, scaled by a resistor divider consisting of 1087, 970, 864, 769, 1298, 1031, 819, 923, 1531, 708 ohm resistors. All the devices ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LM3915
The LM3914 is an integrated circuit (IC), designed by National Semiconductor in the late 1970s, used to operate displays that visually show the Magnitude (mathematics), magnitude of an analog signal. It can drive up to 10 LEDs, LCDs, or vacuum fluorescent displays on its outputs. The linear scaling of the output thresholds makes the device usable, for example, as a voltmeter. In the basic configuration it provides a ten step scale which is expandable to over 100 segments with other LM3914 ICs in series. Features The LM3914 / LM3915 / LM3916 are identical except for the ten resistor divider inside each part. * LM3914 – linear steps, scaled by a resistor divider consisting of ten 1000 ohm resistors. * LM3915 – 3decibel, dB logarithmic scale, logarithmic steps, scaled by a resistor divider consisting of 6630, 4690, 3310, 2340, 1660, 1170, 830, 590, 410, 1000 ohm resistors. * LM3916 – VU-meter steps, scaled by a resistor divider consisting of 1087, 970, 864, 769, 1298, 1031, 81 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Current Source
A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it. A current source is the dual of a voltage source. The term ''current sink'' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source driving a resistive load. There are two types. An ''independent current source'' (or sink) delivers a constant current. A ''dependent current source'' delivers a current which is proportional to some other voltage or current in the circuit. Background , - align="center" , style="padding: 1em 2em 0;", , style="padding: 1em 2em 0;", , - align="center" , Voltage source , Current source , - align="center" , style="padding: 1em 2em 0;", , style="padding: 1em 2em 0;", , - align="center" , Controlled voltage source , Controlled current source , - align="center" , style="padding: 1em 2em 0;", , style="padding: 1em 2em 0;", , - align=" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LM79xx
78xx (sometimes L78xx, LM78xx, MC78xx...) is a family of self-contained fixed linear voltage regulator integrated circuits. The 78xx family is commonly used in electronic circuits requiring a regulated power supply due to their ease-of-use and low cost. Nomenclature and packaging For ICs within the 78xx family, the ''xx'' is replaced with two digits, indicating the output voltage (for example, the 7805 has a 5-volt output, while the 7812 produces 12 volts). The 78xx line are positive voltage regulators: they produce a voltage that is positive relative to a common ground. There is a related line of 79xx devices which are complementary negative voltage regulators. 78xx and 79xx ICs can be used in combination to provide positive and negative supply voltages in the same circuit. 78xx ICs have three terminals and are commonly found in the TO-220 form factor, although they are also available in TO-92, TO-3 'through hole' and SOT-23 surface-mount packages. These devices support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
