Nova Patents
EP0973262B1

Current mode logic circuit

Abstract

This record has no abstract on file.

EP0973262B1, drawing sheet 1
Sheet 1 of 12

Term

Term ended

Expired 12 July 2019, 7.2 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

3 claims: 1 independent, 2 dependent

  1. 1
    A portable telephonic system, comprising:a duplex switch for coupling an antenna to a receiver (R X ) and to a transmitter (T X ) ;a power supply arranged to be coupled to said receiver;baseband means for coupling said power supply to said receiver, transmitter and to a keypad and a speaker;a microphone coupled to said baseband means;and a phase-lock-loop (32) for coupling said receiver to said transmitter, said phase-lock-loop (32) comprising: a charge pump for coupling a filter to a phase detector, said phase detector being further arranged to be coupled for receiving a clock signal;and a voltage controlled oscillator for coupling a prescaler (31)and an output to said filter, said prescaler (31) being further arranged to be coupled to said phase detector;characterized in that said prescaler (31) comprises: an input buffer for coupling input signals to clock and inverted clock signal inputs of first (29), second and third flip-flops(28);a first input (A) of said first flip-flop (29)coupled to a first output ( Q ) of said second flip-flop;a second input (B) of said first flip-flop(29)coupled to a first output (Q) of said third flip-flop (28);a first output (Q) of said first flip-flop (29) coupled to a first input (D) of said second flip-flop and to a first clock input (CK)of a fourth flip-flop;a second output ( Q ) of said first flip-flop (29) coupled to a second input ( D ) of said second flip-flop and to a second clock input ( CK ) of said fourth flip-flop;a second output (Q) of said second flip-flop coupled to a first input (A) of said third flip-flop (28);a first output (Q) of said fourth flip-flop coupled to a second input (B) of said third flip-flop (28) and to a first clock input (CK) of a fifth flip-flop;a second output ( Q ) of said fourth flip-flop coupled to a second clock input ( CK ) of said fifth flip-flop;a third input (C) of said third flip-flop (28) coupled to the output (O) of a logic gate (30);a first input of said logic gate (A) coupled to receive a select signal (MODE SELECT);a first output (Q) of said fifth flip-flop coupled to a first clock input (CK) of a sixth flip-flop and to a second input (C) of said logic gate (30);a second output ( Q ) of said fifth flip-flop coupled to a second clock input ( CK ) of said sixth flip-flop;and a third input (B) of said logic gate (30) coupled to a first output (Q) of said sixth flip-flop;
  2. 2
    The portable telephonic system of Claim 1, wherein said baseband means is an analog/digital baseband means.
  3. 3
    The portable telephonic system of Claim 1, wherein said power supply comprises a battery pack coupled to a power supply/regulators.
Independent claims3