MN Series MN9 -Stage Ultra Low Voltage Operation BBD for Audio Signals Overview The MN9 is a -stage ultra low voltage operation BBD variable delay line in audio frequency range. The device operates on + V supply and provides a signal delay up to.8 ms and is suitable for use as reverberation effect of low voltage operation audio equipment such as portable stereo, radio cassette recorder and microphone. Pin Assignment Features Variable signal delay of the audio signal :.8 to.8 ms Wide range of supply voltage :.8 to. V No insertion loss : L i = db typ. Wide dynamic range : S/N=7 db typ. Low distortion : THD=. % typ. (V i =. V rms ) Clock frequency range : to khz (.8 V <. V) khz to MHz (. V. V) N-channel -layer silicon gate process 8-Pin Dual-In-Line Plastic Package CP IN 8 MN9 7 DIP8-P- V D OUT CP V D Applications Reverberation and echo effects of audio equipment such as radio cassette recorder, car radio, portable radio, portable stereo, echo microphone and Karaoke machine, etc. Sound effect of electronic musical instruments Variable or fixed delay of analog signals Block Diagram IN CP CP -Stage BBD 8 7 V D OUT V D Pin Descriptions Pin No. Symbol Pin Name Description Ground pin Connected to ground. CP Clock input Basic clock pulse is applied to transfer electric charge of BBD. IN Signal input pin Analog signal to be delayed is input. Most suitable DC bias should be applied to this pin. apply pin Bias is applied to the gate of MOS transistor which is inserted in series with clock pulse input gate of the BBD transfer gate. Furthermore, voltage is supplied to step-up circuit. V D V D apply pin The same phase clock pulse as CP is applied through capacitor. CP Clock input Clock pulse of inverted phase to CP is applied. 7 OUT Output pin Composed signal of th and th stages is output. 8 V D V D apply pin The same phase clock pulse as CP is applied through capacitor.
MN9 MN Series Absolute Maximum Ratings Parameter Symbol Ratings Unit Pin voltage, V D, V D, V CP, V I. to +. V Output voltage V O. to +. V Operating ambient temperature T opr to + C Storage temperature T stg to + C Operating Conditions Parameter Symbol Conditions min typ max Unit +.8 +. +. V Clock voltage "H"level V CPH V Clock voltage "L"level V CPL V Clock input capacitance C CP pf Clock frequency f CP () * khz Clock pulse width t w(cp) * Clock rise time t r(cp) * Clock fall time t f(cp) * Clock cross point V X * Note) * : ( ) : =. to. V * :T=/f CP (Clock period) Electrical Characteristics =V CPH =V, V CPL =V, R L =kω, LPF : f C =khz, A tt =8dB/oct., Parameter Symbol Conditions min typ max Unit Supply current I DD f CP = khz. ma Signal delay time t D =.8 to. V, f CP = to khz N * ms Signal delay time t D =. to. V, f CP = khz to MHz f CP.T * ns ns.v CPH V Input signal frequency f i f CP = khz, V i =. V rms khz Output attenuation db( db at f i = khz) Input signal amplitude υ i f CP = khz, f i = khz, THD=. %.. V rms Insertion loss L i f CP = khz, f i = khz, V i =. V rms db Total harmonic distortion THD f CP = khz, f i = khz, V i =. V rms.. % Output noise voltage V no f CP = khz, Weighted by "A"curve.9. mv rms Signal to noise ratio S/N 7 db Note) * : N=BBD stages Circuit Diagram * : Clock pulse waveforms CP CP t r(cp) 9% % % t w(cp) T t f(cp) V X 8 V D V IN 7 7 OUT V D CP CP
MN Series MN9 Typical Characteristics DC output voltage V O V O V I =V fcp=khz Output signal level V o V o V i =V f CP =khz f i =khz THD V i =V f CP =khz f i =khz DC input voltage V I Output noise voltage V no 9 8 7 V no f CP =V G i f i =V f CP =khz khz G i V i =V f i =khz f CP =khz khz 8 8 Clock frequency f CP (khz).. Input frequency f i (khz) G i f CP =V f i =khz THD V Bias =V fi=khz fcp=khz Vi=.Vrms G i Ta VDD=V fi=khz fcp=khz Clock frequency f CP (khz).....8.. Input bias voltage V Bias 8
MN9 MN Series Typical Characteristics (To be continued) (max) 7 V i(max) Ta =V f CP =khz f i =khz THD=.% Input frequency f i (khz) f i Ta VDD=V fcp=khz Vo(f i )=V o (khz) db.8... THD Ta =V f i =khz f CP =khz V i =.V rms 7 8 8 8 Supply Voltage Characteristics Input bias voltage V Bias V Bias THD f CP =khz f i =khz V i =V i(max) db Input frequency f i (khz) 8 f i fcp=khz Vo(f i )=V o (khz) db 8 8 8 (max) V i(max) f CP =khz f i =khz THD=.% G i fcp=khz fi=khz Vi=V i(max) db Signal to noise ratio S/N (db) 9 8 7 S/N 8 8 8
MN Series MN9 Package Dimensions (Unit : mm) DIP8-P- 9.±. 8.7min..±..±..8max..±.. 7.±. to.±..±. SEATING PLANE. +..