Question

+Vcc w CT U1 U2 T. u1 Trigger Input T RT Ov Simultaneously draw the voltages V1 and VQ on the side CMOS oscillator circuit and find the expression of the output frequency. NOTE: Omit output impedances (Rout = 0)..

Answer 1

Au pler 은 Page. STUDY BUDDIES & Voc sel Ur TH 17 7 O ted. It suppose the trigger ipt is held high at logie 'I' level the Resistor R in order that the output from the NAND gate Vi is at logic o level, the timing Resistor R y Connated to a clogic oclevel which Can Cause the capaitor Ç to get discharged. The op of U, is at low Capacitor G is totally difehang- function vi i adequate to o leading to Lethe off from the second . NAND gate Ue, which is Connected as an inverting Nog gate will be high a The output from the second WAND gate Up eg feedback to aip u, to supply the required regeneration - Since the Junction V, and Therefore the off of u are beth at logic "o' nocument flows within the capacitor , This leads to the act being stable and it will remain during in this state cuntil the trigger ilp I changefe If a-ve pulfe į now applied to the trigger up a the NAND CKT U, the opp of u will go High to logic lo. one

le the voltage across the Capacitor Can't changes Penytantaneously this may cause the junctionalities and V and also the the ilp to Ue to also go high, which sugreturauss will make the olp of the WAND gate Ve Changy to logico, the during this second state albeid the trigger ilp pulse I is removed that's known as at will now renais Meta-stable state + the vlg across the capaitor will now increase because the Capacitor G Starty to agitate from the opp q O, this changing Current ý unable to carry the input Up and hence Jeunetion & high. wihen this happens the opp of Ve Switches high agam Topic 1, which successively causes the opp of u to travel Low and therefore the capacitar difeharges into the output of u ander the influence of Refistor R. the Circuit now switched balk to their original Stable State Then they for every negative going figyes pulter the monostable mulitiwibrator Ciruet produces a low going olp paljo. The length of the output period of time į decided by the Capuites (Register Combination Le RC Netwoice and giver the time conftant To 0.6986 of the Cikt in Seconds

Here T=0.69 ₂. CT Date / Page TOP STUDY BUDDIES mere We all know TE f * = 0.69 R. CT fa 0.69 & G E To 45 RACT 1.45 "Olp frequency fi RG wave foung of V, que of v tvo Belous 1 Trigger pultes to > M I to iti t 1 vo Ve to t Tot Thank you