SU1397737A1 - Device for regulating level of sound pressure of electroacoustic converter of electronic time piece - Google Patents

Abstract

This invention relates to electronic time instruments. The purpose of the invention is to expand the range of adjustment of the sound pressure level of an electroacoustic converter (EF), reduce power consumption and simplify the design. To increase the level of sound pressure, the consumer via the control unit sets to the ring counter 5 the corresponding command „Last switches to the state opening the key circuit and EF 21 passes the excitation signal. The sound pressure level of the EP 21 V COMMUNICATION with an increase in the duration of the control signal impulses, and, consequently, an increase in rgii transmitted from the battery to the EP 21 increases. To decrease the sound pressure level, the control unit sets the counter to 5 V state, which opens circuit 8, and an excitation signal passes to EP 21. At the same time, the level of the sound signal decreases with a decrease in the pulse duration of the control signal. 4 il. v

Description

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The invention relates to electronic time devices, specifically to an electronic clock, mainly wrist {, with a sound system, and can be used in the development of an electronic clock with an electroacoustic converter (EIA).

The purpose of the invention is the pacDiiipeHHe of the range of adjustment of the sound pressure level of the EAP, reducing energy consumption and simplifying the design.

FIG. 1 shows a block diagram of a device for adjusting the sound pressure level of an EAP electronic clock; FIG. 2 is the same; the functional diagram of FIG. 3 shows time diagrams explaining the operation of the device in FIG. 4 — the dependence of the sound pressure level P on the duty ratio of the pulses 9 of the signal control of EL1.

The device contains a master oscillator 15, a divider 2 frequencies, a shaper of 3 pulses of variable duty cycle, a circuit 4, a ring1, a ring counter 5, three key circuits 6-8, a circuit 9 for controlling an acoustic signaling unit UZS and an audible signaling unit 10

The shaper of 3 pulses of variable duty cycle contains the logical elements 2Ш1И 11 and NOT 12. The first key circuit 6 contains the unidirectional key 13 and the logical element NOT 14, the second key diagram 7 is the unidirectional key 15 and the logical element HE 16, the third key diagram 8 is unidirectional1. This key 17 and the logical element NOT 18, Node 10 audible alarm contains a resistor 19, an amplifying transistor 20 and HALL 21.

The output of the generator 1 is connected to the input of the divider 2 frequency. The first code f, divider 2 frequency is connected to the first input of the logic circuit 2Sh 115 the second output f - to the second input T of the logic circuit 2ILI 11 and to the information input of the unidirectional key 13.

The output T of the logic circuit 2Y.PI 1 is connected to the input of the logical element NOT 1 2 and to the information input of the unidirectional key 15, and the output T of the logical element NOT 12 to the information input of the unidirectional key 17, The output of the circuit 4 is the same

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five

0

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Dnees are connected to the input of the ring counter 5. The last-minute outputs of the latter are connected respectively to the direct inputs of the unidirectional keys 13, 15 and 17 and the inputs of the logical circuits 14, 16 and 18, the outputs of which are connected to the inverted inputs of the unidirectional keys 13, 15 and 17 connected to the first the input of the CCD control circuit 9, the second input of which is connected to the third output fj of the splitter 2 of frequency 8, and the third input to the second input F of the circuit 4 of coincidence. The CCD control circuit 9 is a logical element of the CI. The ring scoop is a shift register with pins after each bit whose input is the output of the coincidence circuit 4. The output of logic circuit ZM 9 is connected to the base of the amplifying transistor 20 through a resistor 19, in the collector circuit of which the LAP 21 is turned on, which is powered directly from the power supply.

Falling circuit 4 is a logical element 2I-NOT, the inputs of which receive signals from the counting decrypt (its clock circuit and one of the inputs B is input F of circuit 4 of coincidence: and the output of logic circuit 2I is NOT connected to input ring counter 5,

The device operates as follows (FIGS. 2 and 3).

The 15th clock of the master oscillator 1, which provides a sequence of pulses with a frequency of, for example, 32768 Hz, is connected to the input of the splitter 2 frequency, carried out a frequency division to 1 Hz J

From the frequency divider, a signal with a frequency f /, for example 4096 Hz and a duty cycle equal to 2 (the duration of the pulses is equal), is sent to the input of the 2SHZh circuit of the inverter 3 pulses and a key circuit 6, and to another input of the 2IL1-1 1 1 circuitry of the inverter 3 pulses of variable duty cycle - a signal with a frequency f, 2f, 3, in this case o192Hz5 and a pulse duration of 1/22, the output signal of the 2IL or 11 circuit, which is a disjunction of the input signals with a frequency f, and fj, which is followed by.ibHocTb pr T pulses with a pulse frequency f, and a borehole Tew equal to 4/3

(pulse duration 3 /.) is applied to the key circuit 7. The signal T is inverted by the logical element NOT 12 of the variable duty cycle and, as a sequence of pulses T 5, with a frequency f of a duty cycle of 4 (the pulse duration is 1/2), to the key circuit 8. In the initial state, corresponding to the generally accepted sound pressure level, the ring counter 5 is in the first of three states, opened by the key circuit 6.

The T. signal, which enters the input of this key circuit, passes to one of the inputs of the ZI circuit 9. This signal is modulated by a signal with a frequency fJ equal to 1–8 Hz, which arrives at the second input of the ZI circuit 9 with a frequency divider, if there is a third circuit ZI 9 of the enabling signal F from the circuit 4 coincides with the output of the circuit And, as a pre-player, a sequence of pulses T. and through the resistor 19 to the amplifying transistor 20 and excites HAL 21 o The latter excites and emits an intermittent sound signal. To increase the sound pressure level, the consumer sets the appropriate command to the ring counter 5 via the ENC control unit, the latter switches to the state that opens the key circuit 7, and the EAT 21 passes the excitation signal T, with a pulse frequency in the night f and a pulse duration of 3/2 In this case, the sound pressure level of the EAP 21, in connection with an increase in the duration of the control signal impulses and, consequently, an increase in the energy transmitted from the battery to the electroacoustic converter, increases.

To reduce the sound pressure level, the consumer sets the ring counter to the state that opens the ring circuit 8 and the EA11 21 passes an excitation signal T with a pulse frequency in the parcel f and a pulse duration equal to l / 2 b, the audio signal level EA11 21, however, due to the decrease in the duration of the control signal pulses, it decreases.

As can be seen from the graphical dependence shown in FIG. 4, where - shows the dependence of the sound pressure level P emitted by the EAF on the pulse ratio of the pulses & control signal, another set of sound pressure levels, for example, P, PU, P

It is possible to obtain at other values of the pulse duty cycle Qf, 0ts, 9, for the formation of which it is necessary to use a different scheme for forming 5 l of pulses of variable duty cycle.

Claims (1)

Invention Formula The device for controlling the sound pressure level Q of the electroacoustic converter of the electronic clock, which contains a sound alarm unit, a master oscillator, an output connected to the input of frequency divider 5, a matching circuit whose output is connected to an input of a ring counter, the first output of which is connected to the control key input. , the second output is to the 0 control input of the second key circuit and the third output is to the control input of the third key circuit, and the outputs of the key circuits are combined, differing It means that, in order to expand the control range, a variable-duty cycle pulse shaper and an audio alarm node control circuit are introduced, the variable-duty cycle pulse shaper inputs are connected to the corresponding outputs of the frequency divider, and three outputs are connected to the corresponding circuits, the combined outputs of which are connected to the first input of the control circuit of the audible signal node, the second input of which is connected to the third output of the frequency divider, mp This is with the second input of the coincidence circuit, and the output is with the control input of the sound alarm node, the power input of which is connected to the power source, five 0 five 0 Ji and shish DDL IF V t mmi shshg titg Fig.Z QX 7fe 2 Qij 3 9i 5 6 1 8 9 10 in FIG.