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2009 PAiA Corporation

This second-generation 9700-series processing

element for modular sound synthesizers is

designed to provide great sound and ecellent

value!

The 97"2 monitors the input signal voltage and

copies it to the output# synchronized to changes in

an input control voltage $C%& or an input cloc'# or

synchronized to an internal cloc' if there is noeternal input! The input may (e an audio or

control signal! )ne typical application uses noise

as an input signal and a varia(le rate cloc' to

control sampling! This provides a random control

voltage source from the module output!

The module*s use +ith audio signals is enhanced

(y a s+itch option to change the function from

,sample and hold, to ,gate and hold,# +here the

output trac's the input signal as long as the

control input voltage is a(ove a threshold $or# if

selected# the internal cloc' rises&! After the control

voltage drops# the output voltage freezes until the

net high-going transition of the control voltage $or

the internal cloc' rises again&!

This high-performance module is designed to (e

compati(le +ith most modular synthesizer

systems +ith little or no modification! ost active

components are already mounted# ma'ing

assem(ly a snap!

Sample and Hold

odel 97"2 Assem(ly and .sing anual

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2

ASSEMBLING THE 9752 Sample and Hold

/efore (eginning assem(ly# go through the manual! oo' at the dra+ings!

1eel the parts! ou*re naturally eager to plunge right in# (ut ta'e a fe+

deep (reaths first! Chec' the parts supplied against the pac'ing list at the

(ac' of this manual!

In some cases, notes packed with the parts will be used to call your attention

to special situations. If parts are missing, please notify PAiA at

missing@paia.com or by phone at (405) 340-300, fa! (405) 340-3"#. A

$%&' page is incl*e* at the en* of this manal.

3otice that each step in the manual is mar'ed +ith a

chec'off (o li'e this4

5683AT8)3 56C! A:;83$ & :27

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odern electronic components are small $in case you hadn*t noticed& and

values mar'ed on the part are often difficult to see! Another handy tool for

your (ench +ill (e a good magnifying glass! Also use the magnifier to

eamine each solder Boint as it is made to ma'e sure that is doesn*t have

any of the pro(lems in the )56:83 section +hich follo+s!

SOLDERING

elect a soldering iron +ith a small tip and a po+er rating of not more than

" +atts! oldering guns are completely unaccepta(le for assem(ling

solid-state euipment (ecause the large magnetic field they generate can

damage components!

.se only a high uality electronic solder! our 'it is compati(le +ith lead-

free andDor tin-lead flu-core solders made especially for electronic

assem(ly! Plum(ing solder +ill destroy your 'it +ith its acid core! Ee+elry

solder $silver solder& +ill destroy your 'it +ith its high +or'ing heat! 3either

is for electronics +or'!

A proper solder Boint has Bust enough solder to cover the soldering pad anda(out

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G

Top of circuit (oard

T: soc'et

>stereo phone Bac'?

Potentiometer

=eader

CONTROLS AND CONNECTORS

Controls and connectors +ill (e installed on the top

side of the (oard +ith the placement designators as

sho+n in the illustration to the right!

iniature phone connectors referenced as >stereo

phone Bac's? in the manual parts list are specified(elo+ +ith the contactDterminal names# Tip# :ing and

leeve $T:& and are la(eled on the (oard and

schematic as such!

The potentiometers have ta(s etending from their (ody

for sta(ility! They have a snap-fit to the (oard! Align

the ta(s and pins +ith their holes and press them into

place! There is no need to (end the ta(s or terminals!

To ensure the (est alignment +ith these parts +ith the

front panel# (egin (y soldering only one of the multiple

terminals associated +ith each of the follo+ing parts

as it is installed! Then# if a part is tilted or croo'ed# itis only a matter of reheating the Boint as the part is

aligned!

atch the ta( of the polarized po+er connector +ith the

corresponding (oard mar'ing!

568! 56C! A:;83

$ & E< T: soc'et# c!c! G terminals

$ & E2 T: soc'et terminals

$ & E T: soc'et terminals

$ & EG T: soc'et terminals

$ & P<

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CAPACITORS

8nstall the non-polarized polyester capacitor! 6ither lead can goin either hole! ocations are provided for optional# time constantaltering capacitors at the Cs

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P)H6:83 A35 T6T83

Po+er to the circuit is via a four-circuit# dual-polarity 5C po+er supply! A po+er connector ca(le matches theheader for connection +ith one of the PAiA 977 supplies at

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Note

538 mar'ing is 5o 3ot 8nstall note to manufacturer! These are designations +here optional capacitors may (einstalled# parallel-connecting +ith capacitors associated +ith time constants4 Cs

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DESIGN ANAL!SIS

The heart of the sample and hold module is (ased around the 19I 8C! amples are ta'en from an inputon Pin +hen the $not&= pin is pulled lo+ and are stored in capacitor C! Hhen the $not&= pin is pulledhigh# the sample is output from Pin " into .

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9752 Pa"t L#t

Please chec' the parts against this list! As you locate a part type and verify the uantity $and mountinghard+are -- if reuired& chec' it off in the space provided!

/ecause +e have introduced surface-mount parts +ith these 'its# +e are providing the printed circuit card as asu(-assem(ly +ith the surface-mount parts already in place!

Also# +e +ant to ma'e you a+are that +e are using (oth linear- and audio-taper potentiometers in some of themodules! They are mar'ed differently so +e are as'ing that you chec' carefully!

I$ an%tn' # m##n' pleae not#$% PA#A at m##n'(pa#a)*omo" +% p&one at ,-.5/ 0-.10..3 $a4 ,-.5/0-.107)

9752 Tet Po#nt Data

TP< K

$ & < 97"2 1ront Panel# ample and =old

$ & <

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666)pa#a)*om