#op amp circuits

[wlia2oang]

High speed op amps, general purpose op amps, voltage amplifying device

LM Series 0.6 V/us 32 V SMT Single Supply Quad Operational Amplifier - SOIC-14

[brin2lott]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--general-purpose/ts393idt-stmicroelectronics-4394615

Amplifiers, General Purpose Amplifiers, TS393IDT, STMicroelectronics

TS393 Series 16 V 600 pA SMT Micropower Dual CMOS Voltage Comparator - SOP-8

[snsgj2gee]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--general-purpose/ts393idt-stmicroelectronics-2252658

OP amp circuits, electronic voltage amplifier, Operational amplifier circuit

TS393 Series 16 V 600 pA SMT Micropower Dual CMOS Voltage Comparator - SOP-8

[alx2psson]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--low-noise-amplifier/ba4560f-e2-rohm-3414471

Low noise amplifier, Ultra low noise op amp, Microwave low noise amplifiers,

Dual Channel 30 V 6 mV Surface Mount Low Noise Amplifier - SOP-8

[dvd2ddard]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--general-purpose/ts391iylt-stmicroelectronics-5181997

Amplifiers, what is operational amplifier, op amps, Operational amplifier chip

TS391 Series 36 V 400 nA SMT Single General Purpose Comparator - SOT-23

[drnk2nkss]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--general-purpose/tl084idt-stmicroelectronics-6240253

Operational circuit, general-purpose op amp, Power op amp, operational amplifier

TL084 Series 36V 4 MHz General Purpose JFET Quad Operational Amplifier - SOIC-14

[jol2pland]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--general-purpose/ts393idt-stmicroelectronics-1027334

Power operational amplifier, power op amp, operational circuits,

TS393 Series 16 V 600 pA SMT Micropower Dual CMOS Voltage Comparator - SOP-8

[nck2liftn]

https://www.futureelectronics.com/p/semiconductors--analog--amplifiers--low-noise-amplifier/ba4560f-e2-rohm-9106267

Operational amplifier, high-gain electronic voltage amplifier, low noise op amps

Dual Channel 30 V 6 mV Surface Mount Low Noise Amplifier - SOP-8

[rymnd2liso]

Comparator applications, NOR gate indicate, Comparator circuit, NAND gates

LM2903 Series 36 V 250 nA SMT Dual Low Power Voltage Comparator - SOIC-8

[chrl2lamb]

Inverting comparator, comparator applications, voltage comparator

LM2903 Series 36 V 250 nA SMT Dual Low Power Voltage Comparator - SOIC-8

[dnlad2roa]

Single Supply Operational Amplifier, general purpose amplifier circuit

TS393 Series 16 V 600 pA SMT Micropower Dual CMOS Voltage Comparator - SOP-8

[ninie2zals]

DC-coupled high-gain electronic voltage amplifier, Amplifier circuit

LM Series 0.6 V/us 32 V SMT Single Supply Quad Operational Amplifier - SOIC-14

[lyl2kvinn]

Ultra low noise amplifier, rf amplifier, Microwave low noise amplifiers, op amps

Dual Channel 30 V 6 mV Surface Mount Low Noise Amplifier - SOP-8

[all-hail-the-conn-8d]

Number of mods needed on the new SDS7 CPU board: 1 2 17

[fuzzkaizer]

Roland - AP-7 Jet Phaser

"... Most people know Roland Corporation for one of two reasons: One; for its amazing synthesizers and drum machines spanning several decades. Two; as the parent company of Boss, the biggest effects brand on the planet. Some pedal enthusiasts are unaware that Roland itself made pedals—good ones! 

For a time in the ‘70s, Boss and Roland intermingled with one another, with Roland choosing to slap the Boss name on certain effects (CE-1, DM-1, DB-5) and its own name on the rest, even though some of this gear shared similar enclosures, and even though some pedals were branded as one company, but as the evolution of the other company’s innovations (such as the Boss CE-1 being a standalone Roland Jazz Chorus effect). I’m here to talk about perhaps the most unsung vintage Roland piece; the AP-7 Jet Phaser.

For reasons unbeknownst, Roland excelled at ensconcing a stellar (oftentimes dirt) circuit within the confines of another, larger pedal and releasing the non-dirt part as a standalone model. One such example is the AD-50 Double Beat fuzz wah, containing an absolutely disgusting fuzz circuit yet releasing the AW-10 Wah Beat. 

The Jet Phaser is just such a circuit, combining phaser with, well . . . “Jet.” Much like the fuzz section from the Double Beat is—by virtue of naming conventions—a form of “beat,” “Jet” refers to an absolutely screaming distortion effect that sits in front of a juicy phaser circuit—the same one found within the AP-2 Phaser. 

This highly-adapable Jet circuit transforms the mild mannered phaser into a pulverizing throb, jumping out of the mix with some serious propulsion. Larry Graham of Sly and the Family Stone famously used one, as did Ernie Isley of the famous brothers, on “Who’s That Lady?.” In fact, that thick, viscous fuzz you hear on that cut’s leads is the characteristic Jet sound, and has been one of the most quietly sought-after lead tones in history. 

The Jet side of the circuit has no analog in today’s pedal market, it’s a curious piece of circuit, featuring equal parts discrete semiconductors and monolithic op-amps. A rotary switch on the face of the unit selects between four forms of Jet and two of Phase. Switching between the Jet settings yields different tonal compounds, cycling between gain stages, a notch filter and more. All of this is controlled by one master Jet knob, which offers varying intensity rather than a simple volume. On all Jet settings, the phaser is integrated; no configuration offers an isolated Jet section.

On the phaser side, we have an eight-stage FET-based phaser with a Resonance control. As far as vintage offerings are concerned, eight stages—the MXR phaser line of the 45, 90 and 100 offers two, four and six stages respectively—is quite a feat. With the added Resonance control, the phaser section can actually give your amp a little bit of a nudge at the peaks.

Much like the Maestro PS-1A (and B), the Jet Phaser offers a Fast/Slow footswitch that comes in the form of . . . an actual footswitch instead of clunky organ rockers. Maestro’s model offers ramping between speeds if you switch it on the fly; difficult if you’re not wearing pointy heels or cowboy boots, so the ramping feature wasn’t a tactfully expressive performance tool. The Jet Phaser solves all this by offering a Fast/Slow switch and letting you set your slow speed with a knob (the “Fast” setting is just this same knob turned all the way up). When switching between the two speeds, the rate gradually descends to the desired level.

Finally, I would be remiss if I didn’t include my all-time favorite effects-adjacent video—Larry Graham absolutely shredding on a Jet Phaser. ..."

cred: catalinbread.com/kulas-cabinet/roland-ap-7-jet-phaser

[stevebattle]

Spock’s Brain (1990) by IS Robotics (iRobot), Somerville, MA. This hard-wired analogue brain is designed to emulate the brain of an insect, modelling how the insect gait transforms seamlessly from a slow, statically stable walk to a faster dynamic running motion. It controls the gait of a simulated hexapedal robot, represented by on-board LEDs for each leg. The legs maintain synchrony with signals flowing both longitudinally and laterally. Each leg has an identical circuit; the XR-2207 is a voltage controlled oscillator for timing, the 74123 is a dual retriggerable monostable multivibrator producing a square wave output to actuate the leg, and the smaller 8 pin TL082C is a dual op-amp.