Circuits & Schematics Maxim - 4

31. Simple Additions To Audio Amplifier Prevent Clipping At Higher Inputs
    John Guy
    Circuits Audio Amplifiers Maxim MAX9700A
    Amplifying the human voice presents some tough challenges. One of the toughest of these is providing enough amplification to make sure a soft-spoken person can be heard while allowing sufficient headroom for people who speak loudly. If the ...
    Dec 27, 2021
32. Charge Pump Extends Current-Sense Amplifier's Input Range Down To 0 V
    Bill O'Neil
    Circuits Analogue Design Measurement Maxim MAX1852 MAX4081
    In addition to the traditional lead-acid battery, modern electric/hybrid cars often include a large capacitor (40 F or more) as a backup power source. Located under the rear seat, this capacitor ensures an extra 10 to 15 minutes of driving time ...
    Dec 9, 2021

33. Moving-coil meter measures low-level currents
    Kevin Bilke
    Circuits Measurement Maxim MAX4172 MAX495
    Although an analog moving-coil meter may lack the resolution and accuracy that a digital readout provides, a meter remains the display of choice for certain applications. A digital readout simply cannot provide information about a measurement's ...
    Oct 23, 2021
34. MOSFET enhances low-current measurements using moving-coil meter
    Stefan Strózecki
    Circuits Measurement Maxim MAX4172 MAX495
    A previous Design Idea describes an interesting and useful method for using a moving-coil analog meter to measure currents in the less-than-1A range ( Reference 1 ). The design offers considerable flexibility in the choice of meter-movement ...
    Oct 20, 2021
35. Pushbuttons and digital potentiometer control boost converter
    Simon Bramble
    Circuits Supply Maxim MAX1771 MAX5160
    Digitally controlled potentiometers are useful for generating analog control voltages under the control of a microcontroller. In some applications, manual pushbutton switches could replace a microcontroller and simplify product design. Mechanical ...
    Oct 11, 2021
36. Circuit provides Class D motor control
    John Guy
    Circuits Audio Supply Maxim MAX4295
    Class D audio amplifiers provide a dual benefit for battery-powered portable devices (Figure 1). They enhance battery life, and they produce much less power dissipation than do their linear cousins. Those features make Class D amplifiers ideal ...
    Aug 26, 2021
37. Circuit provides reverse-battery protection
    John Guy
    Circuits Supply Maxim MAX4636
    A universal problem in battery-operated devices is the threat of damage when an end user (never an engineer) inserts the battery backward. You can avoid damage by inserting a single diode or by using a diode-bridge configuration, but those fixes ...
    Aug 16, 2021
38. A 4- to 20-mA loop needs no external power source
    Shyam Tiwari
    Circuits Measurement Maxim MAX4073H
    The simple circuit in Figure 1 uses a low-current-drain MAX4073H amplifier to sense the current flowing through a 4- to 20-mA loop. The circuit senses the current through a 1 Ω resistor with a fixed gain of 100 and uses no battery or dc power ...
    Aug 3, 2021
39. Analog switch expands I2C interface
    Circuits Interfaces Maxim MAX4562 MAX4572
    Perhaps the most effective way to gain board space and increase component density is to minimize wiring on the board. A widely used architecture that allows such miniaturization is the I 2 C bus. Comprising only a bidirectional data line, SDA, and ...
    Jun 30, 2021
40. Minimize the short-circuit current pulse in a hot-swap controller
    Jim Sherwin Thong Huynh
    Circuits Supply Maxim MAX4272
    Because of internal circuit-breaker delay and limited MOS-gate pulldown current, many hot-swap controllers do not limit current during the first 10 to 50 µsec following a shorted output. The result can be a brief flow of several hundred ...
    Jun 27, 2021

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