Operational Description

FCC ID: PARMP-K80

Operational Description

Download: PDF
FCCID_150639

2. Pin assignment & Description Pin No. Pin name Description 1 R-ch INPUT It cuts DC with the capacitor and it inputs R-ch audio signal. 2 Pre-emphasis time constant It connects a capacitor for the time constant of pre-emphasis. 3 LPF time constant This is 15kHz LPF. 4 Filter It is a ripple filter for the reference voltage of the audio part. 5 Composite signal output It connects to the FM modulator. 6 GND GND 7 PLL phase detector output It connects to the PLL LPF circuit. 8 VCC Power supply terminal 9 RF Oscillator This is the base terminal of the colpitts oscillator. 10 RF GND RF GND 11 RF output It connects to the antenna through BPF. 12 PLL VCC PLL power supply terminal 13 X'tal Oscillator It connects a 7.6MHz crystal oscillator. 14 X'tal Oscillator It connects a 7.6MHz crystal oscillator. 15 Chip enable(/CS) The terminal to make high level in serial data input. 16 Clock(SLK) The clock which takes data and synchronization in serial data input. 17 Data(SDA) The input terminal of the serial data which is forwarded from the controller. 18 Audio Mute 0.8VCC ≤ Pin18 : Mute ON 0.2VCC ≥ Pin18 : Mute OFF 19 Pilot signal adjust Pilot signal adjust terminal 20 LPF time constant This is 15kHz LPF. 21 Pre-emphasis time constant It connects a capacitor for the time constant of pre-emphasis. 22 L-ch INPUT It cuts DC with the capacitor and it inputs L-ch audio signal.

3. Explanation for Terminal Function 3-1 Pre-emphasis Circuit 1 R-ch audio source input terminal L-CH It cuts DC with the capacitor and it inputs R-ch 1 1608 R402 C403 audio signal. 27KJ 2.2n/16V 1608 1608 1 2 2 1 22 L-ch audio source input terminal CA403 CA402 22 21 20 1/10V 1/10V It cuts DC with the capacitor and it inputs L-ch A A L-in LPF Pre-emp ROHM R403 27KJ audio signal. R-CH 1608 Pre-emp 1 2,21 Pre-emphasis time constant terminal LPF R-in It connects a capacitor for the time constant of 1 2 3 1 2 2 1 pre-emphasis. CA404 R404 CA405 1/10V 27KJ 1/10V C406 τ = 22.7kΩ × C A 1608 R405 A 2.2n/16V 1608 27KJ 1608 3-2 LPF Circuit 3,20 LPF time constant terminal C402 150p/50V This is 15kHz LPF. 1608 It connects a 150pF capacitor. 22 21 20 19 18 17 L-in LPF Mute Pre-emp Pilot adj Composite Pre-emp Filter R-in LPF 1 2 3 4 5 6 C407 150p/50V 1608 3-3 Ripple Filter of Power Supply Composite 4 Filter terminal Pre-emp GND Filter It is a ripple filter for the reference voltage of the audio R-in LPF part. 1 2 3 4 5 6 7 1 CA407 10/10V 2 A

3-4 Modulation Rate Adjust 5 Composite signal output terminal Composite RF GND Pre-emp RF osc RF out GND VCC Filter It connects to the FM modulator. R-in LPF PLL 10 11 1 2 3 4 5 6 7 8 9 MPX 1 CA406 10/10V 1 A 2 R411 5.1KJ 1608 R412 5.1KJ 1608 6 GND X-tal osc X-tal osc Pilot adj Pre-emp PLL VCC 3-5 PLL Loop Filter 7 PLL phase detector output terminal Composite Pre-emp RF GND RF osc RF out Filter GND VCC LPF R-in PLL It connects to the PLL LPF circuit. 10 11 1 2 3 4 5 6 7 8 9 R406 C412 20KJ 330p/16V 1608 2 1 CA408 R413 VCC-TX 10/10V 10KJ A 1608 1 CA409 100/10V D 2 VT R417 C415 2.2KJ 1 47n/16V 1608 1608 R418 3.3KJ 1608 2 1 R419 CA410 R420 100J 100/10V 3.3KJ C416 1608 D 1608 2.2n/16V 1608 Q402 2SD2142K SOT-23 ROHM 8 Power supply terminal

X-tal osc X-tal osc PLL VCC 3-6 VCO 9 RF oscillator terminal RF GND RF osc RF out VCC This is the base terminal of the colpitts 10 11 oscillator. 8 9 R410 C411 L401 It connects time constant of the oscillation. 0R0 15p/16V 5CBM-5023 1608 1608 SMD-4 TOKO C413 18p/16V 1608 C414 33p/16V 1608 1 2 D401 KV1471E URD TOKO R414 10KJ 1608 PLL VCC 3-7 RF Output 10 RF GND RF GND B401 RF osc RF out GFWB1 11 RF transmission output terminal SMD-5 ANT SOSHIN It connects to the antenna through BPF. 10 11 1 9 1 2 3 C409 R407 1n/16V 360J 1608 1608 C420 R408 R409 100p/50V 82J 82J 1608 1608 1608 12 PLL power supply terminal 3-8 X’tal Oscillator 13,14 X'tal oscillator terminal X401 It connects a 7.6MHz crystal oscillator. 7.6MHz/20pF SX-3(ATS-25/SMD) C404 C405 14 13 12 27p/50V 27p/50V 1608 1608 X-tal osc X-tal osc CS PLL VCC

3-9 Input of the Serial Data 15 Chip enable terminal PB4 PB3 PB2 The terminal to make high level in serial data input. 1 1 1 16 Clock input terminal The clock which takes data and synchronization in 22 21 20 19 18 17 16 15 14 13 12 serial data input. L-in CS Mute SDA SCK LPF Pre-emp X-tal osc X-tal osc Pilot adj PLL VCC 17 Data input terminal The input terminal of the serial data which is forwarded from the controller. 3-10 Audio Mute 18 Audio mute terminal 0.8VCC ≤ Pin18 : Mute ON 0.2VCC ≥ Pin18 : Mute OFF 3-11 Separation Adjust 19 Pilot signal adjust terminal C412 330p/16V 1608 2 1 CA408 R413 10/10V 10KJ A 1608


Document Created: 2001-05-09 18:20:15
Document Modified: 2001-05-09 18:20:15
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC