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In DPSK mode the 73K322L modulates a serial bit stream into di-bit pairs that are represented by four possible phase shifts as prescribed by the V.22 standards. The base-band signal is then filtered to reduce intersymbol interference on the bandlimited 2-wire telephone line. Transmission occurs using either a 1200 Hz (Originate mode) or 2400 Hz carrier (Answer mode). Demodulation is the reverse of the modulation process, with the incoming analog signal eventually decoded into di-bits and converted back to a serial bit stream. The demodulator also recovers the clock which was encoded into the analog signal during modulation. Demodulation occurs using either a 1200 Hz carrier (Answer mode or ALB Originate mode) or a 2400 Hz carrier (Originate mode or ALB Answer mode). The 73K322L uses a phase locked loop coherent demodulation technique for optimum receiver performance.
Detector Circuits When DC bias is available, Schottky diode detector circuits can be used to create low cost RF and microwave receivers with a sensitivity of -55 dBm to -57 dBm.[1] Moreover, since external DC bias sets the video impedance of such circuits, they display classic square law response over a wide range of input power levels[2,3]. These circuits can take a variety of forms, but in the most simple case they appear as shown in Figure 12. This is the basic detector circuit used with the HSMS-286X family of diodes.
TDUHC124 is a precision isolation amplifier incorporating an uncommitted operational amplifier for input condi- tioning, a novel duty cycle modulation-demodulation technique and excellent accuracy. Internal input pro- tection can withstand up to 30V differential without damage. The signal is transmitted digitally across a differential capacitive barrier. With digital modulation the barrier characteristics do not affect signal integrity. This results in excellent reliability and good high frequency transient immunity across the barrier. Both the amplifier and barrier capacitors are housed in a plastic DIP.
Parr number/PDF Mfg Pack D/C Descrpion
TDUHC124   TDUHC124 TDUHC124 PDF Download TDI TQFP64 04+ † The input-to-output differential across
TDUHC124B   TDUHC124B TDUHC124B PDF Download TDI QFP 0143+ The sensor can be operated in its default mode o
TDUHC124B(56579A)   TDUHC124B(56579A) TDUHC124B(56579A) PDF Download TDI QFP 02+ The XC4000E family is a superset of the popular
TDUHC124B56579A   TDUHC124B56579A TDUHC124B56579A PDF Download TDI O7+ Upon power-up, the FIFO must be reset with a Res
TDUHC124BF   TDUHC124BF TDUHC124BF PDF Download 14 There is an internal diode from each pin to VEE.
TDUHC124BF/56579A   TDUHC124BF/56579A TDUHC124BF/56579A PDF Download The Texas Instruments (TI) translation v
TDUHP112   TDUHP112 TDUHP112 PDF Download 07+ Storage Temperature−40C to +150C (1) Stre
TDUHP112-00TC   TDUHP112-00TC TDUHP112-00TC PDF Download The ADM2486 driver has an active-high enable fea
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T.RC2878   T.RC2878 T.RC2878 PDF Download Note 1 These AC characteristics are guaranteed wi
T01M3000   T01M3000 T01M3000 PDF Download † Package drawings, standard packing quant
T01M3232   T01M3232 T01M3232 PDF Download NOTES: (1) Stresses above these ratings may caus
T01M3232MA   T01M3232MA T01M3232MA PDF Download TFK 0114+ When operated in its default mode, the sensor ge
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T02   T02 T02 PDF Download Oscillation Equations for the Dual Inverter Osci
T0202220   T0202220 T0202220 PDF Download Collector-to-Emitter Voltage Continuous Collecto
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T021   T021 T021 PDF Download SSOP28 Low standby power and true fail-safe operation a
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T0220I   T0220I T0220I PDF Download ST SMD 04+ Embedded single-issue, 32-bit MPC8xx core (imple
T025/15089   T025/15089 T025/15089 PDF Download The HYM72V16M636B(L)T6 Series are 16Mx64bits Sync
T025M2   T025M2 T025M2 PDF Download The W256 is a 3.3V/2.5V buffer designed to distri
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T026026A   T026026A T026026A PDF Download A HIGH on this pin when BM is HIGH selects byte b
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T02AA174   T02AA174 T02AA174 PDF Download TSSOP 04+   The LH543601 has two 36-bit ports, Port A
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T02SF   T02SF T02SF PDF Download N/A The HS-80C85RH is an 8-bit CMOS microprocessor
T02ZAE1   T02ZAE1 T02ZAE1 PDF Download 660 mW (Military) Synchronous and asynchronous o
T030   T030 T030 PDF Download Along with the original Plastic Pin Grid Array (
T03061-EL1-CT(5240R)   T03061-EL1-CT(5240R) T03061-EL1-CT(5240R) PDF Download When VCC returns to a level above the internal ba
T0309S   T0309S T0309S PDF Download INNET 40L N/A Cntrl (Bump A1): Shutdown control pin. When VCntr
T03106520RF2494   T03106520RF2494 T03106520RF2494 PDF Download Stresses beyond those listed under absolute maxi
T032   T032 T032 PDF Download SOP5.2 1.ICC is dependent on output loading when the de
T0327   T0327 T0327 PDF Download The extremely high maximum data rate is achieved
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T034127721   T034127721 T034127721 PDF Download [H] PLCC involves the following phases :   PHASE 0:
T03428DS-LCD   T03428DS-LCD T03428DS-LCD PDF Download Figure 1: Figure 2: Figure 3: Figure 4: Figur
T034PWR   T034PWR T034PWR PDF Download TI TSSOP16 01+   2.1 General. The documents listed in this
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T038   T038 T038 PDF Download SC SOP-8 01+ Timer counter 4 : 8-bit 1   (square-wave/8
T03812   T03812 T03812 PDF Download 4. Accesses to registers other than CHIPCTL0 are
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